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Triangle congruence proofs quiz. If they are not congruent (or can’t be shown to be congruent), write, “cannot be determined. 2 - Always, Sometimes, Never Warm Up4. Angle B = Angle N Write down the length of MN. This article provides an overview of various methods to prove the congruence of triangles. After clicking the drop-down box, if you arrow down to the answer, it will remain visible. ©3 d2a071N1G rKPu6tUa5 ISDo4fGt6w7ar ke5 ILOLdCH. Choose the reason for each statement from the list below. Study with Quizlet and memorize flashcards containing terms like what additional information could be used to prove that the triangles are congruent using AAS? Select two options. If they cannot be proved congruent, then state that "Congruence cannot be determined. Improve your math knowledge with free questions in "Proving triangles congruent by SSS, SAS, ASA, and AAS" and thousands of other math skills. 1. CPCTC is also included. Worksheet by Kuta Software LLC ©y X2N0y1g6` kKTuMtVaK uScotfJtXwOaXryeT _LDL[Cd. Work through 20 high‑school items on SSS, SAS, ASA, AAS, HL, two‑column logic, and CPCTC, and see where you need review before the test. F s vMdaAdBek dwnixtehT GItnJfmiynMiitheg cG3e7obmWest7rUy1. 5 - Rhombus Diagonals Proof4. v Name - key Period Triangle Congruence Worksheet For each pair to triangles, state the postulate or theorem that can be used to conclude that the triangles are congruent. Given: C is the midpoint of BE AND AD . Congruent Triangles Proof Practice Quiz The quiz below will test your knowledge of all the postulates and theorems that can prove two triangles are congruent. (Tues Nov 17) 4. Identify all pairs of congruent corresponding angles and corresponding sides. Proofs for triangle congruencies - Take a look at our interactive learning Quiz about Triangle Congruencies Proofs, or create your own Quiz using our free cloud based Quiz maker. ALGEBRA® Unit 4 – Congruent Triangles: Sample Unit OutlineGina Wilson (All Things Algebra®, LLC), 2014-2020 Revision for this topic ABC and LMN are congruent triangles. It offers detailed explanations, examples, and practice problems to help students understand and apply these concepts effectively. If they are, state how you know. (Fri Nov 13) 4. Overview This math worksheet provides model problems, practice proofs and an engaging activity on the topic of proving triangles are congruent by the Side Angle Side postulate and the Angle Side Angle Postulate. The need for clear use of language is emphasized Dec 12, 2016 · File for the Post: Triangle Congruence w Proofs Activity I wanted to share an activity that we did last week that was really fun and engaging. Mar 8, 2023 · Practice two-column proofs involving the Pythagorean Theorem, triangle congruence theorems, and other tools. - four sheets of practice proofs (two per page)- one sheet of two challenging proofs with higher difficulty level- one quiz (two pages containi Triangle Congruence Proofs quiz for 9th grade students. When you finish, review your results and see what to study next. ProveIt! Two-Column Proofs Practice Tool Select a proof from the list below to get started. 1 – 4. Use common rules like SSS, SAS, ASA, AAS, or HL as you work, build quick reasoning, and spot gaps before a geometry test. Practice 2 - Look at all the marks to make your decision. They help you determine the dimensions of an unknown triangle provided it is congruent to another triangle whose dimensions are known. Sep 10, 2025 · Triangle Congruence Proofs: SSS, SAS, ASA, and AAS This guide provides a comprehensive overview of triangle congruence proofs, focusing on the SSS, SAS, ASA, and AAS congruence theorems. Given −− −− by Alee0143 10th Grade Math 2 PROVING TRIANGLE CONGRUENCE REVIEW Quiz by Leagardonia25 8th Grade Math 2 Study with Quizlet and memorize flashcards containing terms like congruent, two triangles are congruent if and only if, SSS postulate and more. Give a reason for each step in the two-column proof. 5: Similarity, Isosceles Triangle Theorem, Side Splitter Theorem, Triangle Congruency, Triangle Proofs, Quadrilateral Proofs, Circle Proofs Triangle Congruence Proofs Practice 1. Name: Urit 2—Triangle Congruence COMBINATION Proof Statement Word Bank Geometry Support Unit 2—Triangle Congruence PROOF PRACTICE Name: of Lines Defi:uuon of Angle Bisector of Segment Bisector of Complemennry Angles œfinmon of Supplementary Angles Definitim of Congruency œfirutsoa of Trungle 13. Congruent triangles are triangles that are identical in shape and size, meaning their corresponding sides and angles are equal. Free, unlimited, online practice. It evaluates critical skills in recognizing congruent triangles and applying geometric principles, essential for learners studying geometry. This geometry video tutorial provides a basic introduction into triangle congruence theorems. Nov 16, 2019 · Flow Chart Proofs Fill in the missing reasons or statements in each proof. Learn what it means for two figures to be congruent, and how to determine whether two figures are congruent or not. There may be more than one way to solve these problems. Students will: prove that two triangles are congruent using the SSS, SAS, ASA, AAS, and HL triangle congruence theoremsprimarily focus on 2-column proofs, with some flowchart and paragraph proofs included in the lessonTEACHERS Concept Quiz - Triangle Congruence Proofs Lesson Prep Lesson Details Duration: 50 minutes Learning Goal: Assess conceptual and procedural fluency for triangle congruence proofs, and reassess compositions of transformations. 5: Triangle Proofs 2 Given: BE and AD intersect at point C BC ≅ EC AC ≅ DC AB and DE are drawn Prove: ABC ≅ DEC If you know the distance from Baker to Alta and Baker to Centerville, explain how you could use congruent triangles to find the distance across the lake from Alta to Centerville. Properties of Kites Assignment4. Name___________________________________________ iangle Congruence Proofs Write a Paragraph Proof! Test your knowledge on the congruence of triangles, including definitions, methods, and criteria for proving congruence. MathBitsNotebook Geometry Lessons and Practice is a free site for students (and teachers) studying high school level geometry. Objective: To practice completing triangle congruency proofs using Side-Side-Side (SSS), Side-Angle-Side (SAS), Angle-Side-Angle (ASA), Angle-Angle-Side (AAS), and Hypotenuse-Leg (HL). 8 - All About Kites4. G 4 BMpa4dIe1 XwViKtWhO dIinwfQirnKiYtweH 3Gve1oLmSertxr8yt. Not satisfied? Add some lines: AD = CE Triangle ABE = Triangle CBD (SAS) Therefore triangle CAD = ACE (subtraction) C Which makes Assignment Triangle Congruence - CPCTC Proofs Worksheet in class was from page 2 and 3. 1) Which of the following is Not valid method for proving congruent triangles? 9. Improve your math knowledge with free questions in "Proofs involving corresponding parts of congruent triangles" and thousands of other math skills. Students will practice the necessary skills of proving triangles are congruent to be successful in Geometry and to continue stude A series of multiple choice questions. Mar 6, 2023 · This proof employs the ASA theorem to establish triangle congruence before using CPCTC to prove side congruence. This free geometry proofs worksheet contains problems and proofs where students must use the triangle congruence postulates (SSS, SAS, ASA, AAS, HL, CPCTC) when completing proofs involving Triangle Proofs Worksheet II. The topic of transformations is introduced in a primarily experiential manner in Grade 8 and is formalized in Grade 10 with the use of precise language. 4 Triangle Congruence Day 1 (SSS, SAS) Key 5. Use the triangle congruence criteria SSS, SAS, ASA, and AAS to determine that two triangles are congruent. 3a Triangle Congruence Key Triangle Congruency Lab (Mon Nov 16) 4. (Fri Nov 20) Constructions Extra Credit Assignment Activity G. Prove theorems about lines and angles using triangle congruence criteria and algebra. 7 - Quadrilateral Types Extra Practice4. If you know the congruency theorems well, you wouldn’t face much trouble in doing these worksheets. The heart of the module is the study of transformations and the role transformations play in defining congruence. Questions cover the relationships between angles and sides of triangles, including isosceles and equilateral triangles. Tip: When using corresponding parts of congruent triangles in proofs, always clearly state which congruence theorem you're using before applying CPCTC. Nov 15, 2024 · CPCTC is an important theorem in geometry that helps us understand congruent triangles. SSS, SAS, ASA, AAS, HL Learn with flashcards, games, and more — for free. Prework Make sure you have a class set of compasses for "Module 1 embodies critical changes in Geometry as outlined by the Common Core. 7) Learn how to prove triangles congruent using theorems like SSS, ASA, SAS, and Hypotenuse Leg with videos, demonstrations, and interactive resources. Includes full solutions and score reporting. Geometry worksheet covering: • Proofs • SSS • SAS • ASA • AAS • HL You will receive a worksheet as well as fill in the blank notes with the purchase of this resource. SRT. pdf) or read online for free. docx Day 61 Unit 2B Review for Cumulative Quiz Day 62 Unit 2B Cumulative Quiz-Support - PLEASE SEE TEACHER Day 63 Aug 25, 2025 · Use this 20-question quiz to practice triangle congruence and decide when two triangles can be proven congruent in common cases. Third Angle Theorem −− −− −− −− PQ RQ , PS RS 3. A triangle has three sides, three angles, and three vertices. Identify the correct theorems and properties related to triangle congruence. In general, you will find that following this approach will help you provide solid proofs four out five times. Congruent Triangles Worksheets What is Congruence in Triangles? The most primary shape we learn about in our childhood is a triangle. Practice 1 - For the set below, determine if the triangles are congruent. ” Given a figure composed of 2 triangles, prove that the triangles are congruent or determine that there's not enough information to tell. Learn more with Brighterly. Master congruent triangles with step-by-step practice problems. Study with Quizlet and memorize flashcards containing terms like proving triangles are congruent, side-side-side (SSS), congruent triangles in coordinate plane and more. These solutions show one possible solution. Triangle congruence proof practice is an essential component of geometry that reinforces our understanding of the properties and relationships of triangles. Extra practice for "proofs involving congruent triangles" Congruent Triangles - Two-Column Proofs:This set contains proofs with congruent triangles including SSS, SAS, ASA, AAS, and HL triangle congruence shortcuts. 91 - Kite Diagonals Proof4. Dec 12, 2014 · Monday, 11/12 /12 Triangle Congruence Proofs I can write a two-column proof to show that two triangles are congruent. Work through 20 quick questions to practice SSS, SAS, ASA, AAS, and HL, and check for gaps before a geometry test. CPN BIY. Dec 6, 2023 · Name: Ken Vent Georges Geometry Date: Per: 6 Unit 4: Congruent Triangles Quiz 4-3: Triangle Congruence Proofs Determine if the triangles can be proved congruent, if possible, by SSS, SAS, ASA, AAS, or HL. It explains how to prove if two triangles are congruent using the SSS, SAS, ASA, and AAS postulate Sep 10, 2025 · Page 1: Triangle Congruence Methods and Basic Proofs This introductory page presents fundamental concepts of triangle congruence through structured exercises and proofs. The quiz assesses knowledge of the following triangle postulates and theorems: SSS, SAS, AAS, ASA, HL, CPCTC. Worksheet generator. There are various ways to determine the congruency of two triangles. 6. Oct 23, 2024 · How strong is your geometry? Can you pass this triangle congruence quiz that we have made for you? Take it up and see for yourself. " Free practice questions for Common Core: High School - Geometry - Triangle Proofs. Given: AC FD, 4 1, 6 7 Prove: BC EF 7. A couple lengthy proofs are explored---print worksheets to practice reasons yourself. The problems give certain criteria about the triangles such as equal angles, perpendicular lines, equal sides, or a midpoint and ask students to prove the triangles are congruent based on those given criteria using triangle congruence theorems. This geometry worksheet provides 7 triangle congruence proof problems for students to solve. A figure bounded by three sides is not like other figures that we work with. Find other quizzes for Mathematics and more on Quizizz for free! Directions: Examine each proof and determine the missing entries. Study with Quizlet and memorize flashcards containing terms like Angles, Basic Properties for proofs, Parallel lines and transversals and more. Learn how to use each of those criteria in proofs in this free geometry lesson! Congruent Triangles - Side-Side-Side (SSS) Rule, Side-Angle-Side (SAS) Rule, Angle-Side-Angle (ASA) Rule, Angle-Angle-Side (AAS) Rule, how to use two-column proofs and the rules to prove triangles congruent, geometry, postulates, theorems with video lessons, examples and step-by-step solutions. Click here for Answers ASA, SAS, SSS, RHS Practice Questions Previous: Speed Practice Questions Triangle Proofs Test Review Part I: Multiple Choice ____2____ 1. Aug 25, 2025 · This quiz helps you practice triangle congruence proofs so you can plan clear steps and pick the right postulates. State the proof needed (ASA, SAS, or SSS). Today, we are going to prove two triangles are congruent using two column proofs. Steps for triangle congruence proofs: Write the ‘givens. When you're ready, start the quiz or warm up by exploring congruent pairs. Name the congruent triangles. At least that's what a geometry teacher told us. 4 K KAGlXlX 4rmivgZhZtasV urZeYsNe2rTvKend3. For each pair of triangles, tell: (a) Are they congruent (b) Write the triangle congruency statement. (Wed Nov 18) 4. Geometry notes on congruent triangle proofs using SSS, SAS, HL, ASA, AAS, CPCTC, detour proofs, and isosceles triangles for honors students. ” (Don’t fill in the blanks!) 6. The proof of this generally involves some information we will review today, but here it is two ways: B D E Triangle ABC is congruent to Triangle CBA (side-angle-side) therefore angle A = angle C. Test your knowledge on the foundational concepts of geometry. Attempt these quizzes on Congruence of triangles which has questions with hints and answers. Information for congruent triangle proofs Learn with flashcards, games, and more — for free. I didn't feel like my students were ready to take their test on the team's "designated testing day" so I decided to stay late at work and come up with some additional activities. Test your knowledge on triangle congruence and properties with this quiz. 6 Proof4 ©4 f2x0x1M1W xKLuWtZat uSQolfut9w0azroeM 8LTLICX. C Y wMEaAdxeZ OwyiNtlhj jIXn]fgiRnsiutqei SGSeJoamZe_tHrbyy. Study with Quizlet and memorize flashcards containing terms like SSS Postulate, SAS Postulate, ASA Postulate and more. State what additional information is required in order to know that the triangles are congruent for the reason given. Name the congruent triangles, if any. Write a statement that indicates that the triangles in each pair are congruent. Triangle Congruence Proofs quiz for 8th grade students. Apr 4, 2018 · Congruent Triangles Practice Questions Click here for Questions . 4 - Properties of Rhombi Practice4. G. Day 58 Unit 2B: Triangle Congruence Assessment Review Kahoot Unit 2B: Triangle Congruence Assessment Cumulative Quiz Day 59 Unit 2B: Triangle Congruence Assessment Day 60 Unit 2B Test Corrections TEST DATA SHEET data_sheet. It also has practice questions on Congruence of Triangles which will help to deepen the understanding of the concept. 5: Triangle Proofs 1 1 In the diagram of ABC and DEF below, AB ≅ DE, ∠A ≅ ∠D, and ∠B ≅ ∠E. ∠PQS ∠RQS 2. Key points: Introduction to triangle congruence theorems Detailed explanations Khan Academy Khan Academy Sep 29, 2019 · Two-Column Proofs Mark the given information on the diagram. 6 - Parallelogram Proof4. Practice 3 - What side matches the other. Mar 18, 2018 · Many problems geometry students face deal with triangle congruence. Tap the correct answer to proceed. Congruent triangles are mean Given figures composed of 2 triangles, complete or find the error in the proof that the triangles are congruent. What is the Congruence of Triangles? There are JMAP G. 3b Triangle Congruence and Proofs Practice Key 4. Test your knowledge on congruent and similar triangles, including the different criteria for their congruence and similarity. This quiz will cover the various congruence methods such as SSS, SAS, ASA, and AAS, along with the concepts of correspondence and congruent figures. Prove the Isosceles Triangle Converse Theorem: “If a triangle has two congruent angles, then it is an isosceles triangle. On this lesson, we will work through several triangle congruence Geometry Proofs Examples and you will learn how to complete two column proofs and triangle c The foundation is based on the fact that corresponding parts of congruent triangles are themselves congruent. Use the given information to label the diagram and decide whether the triangles are congruent. Check out other Geometry items!Geometry Lesson: 5. Explore key concepts and boost your geometry skills learn geometry proofs and how to use CPCTC, Two-Column Proofs, FlowChart Proofs and Proof by Contradiction, videos, worksheets, games and activities that are suitable for Grade 9 & 10, complete two column proofs from word problems, Using flowcharts in proofs for Geometry, How to write an Indirect Proof or Proof by Contradiction, with video lessons, examples and step-by-step solutions. Use transformations, line and angle relationships, and triangle congruence criteria to prove properties of triangles. Congruent Triangle Shortcuts- Practice Date________________ Hour____ State if the two triangles are congruent. Test your understanding of triangle congruence by using CPCTC to explain statements about triangles. G. Name the congruent angles and sides for the pair of congruent triangles. Proving Triangles Congruent NOTES From yesterday, you learned that you only need 3 pieces of information (combination of angles and sides) to determine if two triangles are congruent. N w DAVldl8 RrMiBgnhptos7 RrIezsSehr1vLezdO. Given: 1 2, KP MP Prove: YX ZX YY Z Oct 6, 2015 · On this lesson, we will work through several triangle congruence Geometry Proofs Examples that focus on isosceles triangles, cpctc, the base angle theorem, r Chapter 4 PRACTICE Test: Congruent Triangles _____ LT 1: I can identify and classify triangles by angles and by sides. What are congruent triangles and what can you learn from them? Geometry is one of the most fun parts of math. A two-page quiz with different level questions that cover triangle congruence and proofs of triangle congruence. This quiz covers the principles of lines and angles, as well as the proofs of triangle congruence theorems. com If you have questions, suggestions, or requests, let us know. Justify the last two steps of the proof. Given: and Prove: Geometry Unit 4 - Congruent Triangles (Updated April 2020) Triangle Congruence Quiz 1 assesses understanding of triangle congruence through methods such as SAS and SSS. Remember to mark vertical angles and segments that are equal to themselves (reflexive property) Aug 23, 2025 · This triangle congruence quiz helps you spot which pair of triangles is congruent. Congruent triangle worksheets offer exercises like writing congruent parts and postulates, congruence statements, congruence in right triangles and more. Jul 23, 2025 · Triangles are said to be congruent if they measure same in size. Show any other congruent parts you notice (from vertical angles, sides shared in common, or alternate interior angles with parallel lines) Give the postulate or theorem that proves the triangles congruent (SSS, SAS, ASA, AAS, HL) Finally, fill in the blanks to complete the proof. Triangle Congruence by SSS and SAS Practice 5. 0 (92 reviews) What other information is needed to prove the two triangles congruent by SAS? Looking for a comprehensive resource to teach Congruent Triangles? These guided notes and worksheets are perfect for helping your students master congruent triangle concepts, shortcuts, and proofs through clear explanations and practical examples. The common kinds of triangles that we come across every day are equivalent, isosceles, and scalene. Printable Triangle Congruence Proofs Worksheets 2025 and activities designed to help teachers, parents, and homeschool families support kids in mastering geometry concepts effectively. Proofs with Congruent Triangles Worksheets How to Prepare Proofs with Congruent Triangles - Triangles that are identical to each other are typically termed as the congruent triangles. This ready-to-print lesson includes notes and practice worksheets that provide opportunities to prove two triangles are congruent using triangle congruence theorems. In the diagram below of ΔAGE and ΔOLD, GAE LOD and prove that ΔAGE ≅ ΔOLD by (1) GE LD Proving Congruent Triangles | Definition, Proofs & Examples - Quiz & Worksheet Video Quiz Course Try it risk-free for 30 days Instructions: Choose an answer and hit 'next'. 4 Triangle Quiz Review 6. N U kArldlO 3r2ilg2hjtrsA NrPeTsyer wvKeydO. 3 - Properties of Quadrilaterals: Rhombi4. Get quick feedback, fix weak spots before a test, and build proof skills as you go. R Triangle Congruence and Two Column ProofsTriangle Congruence and Two Column Proofs G. Do you know what triangle congruency is? Let's jump right in! Before anything, let's first recall what congruency is. Prove triangles congruent by using the definition of congruence. Geometry Support G r. Math Skill Quizzes You will not find a better mix of problems on this anywhere else. Oct 3, 2020 · Given Given Reflexive property of congruence Side-side-side triangle congruence Definition of congruent triangles If alternate interior angles are congruent then the lines are parallel. Even though it looks complicated, there are many definitions that are fun to learn and fun to use when solving problems. r b GAmlJl^ zriiPgYhatosg WrbeFsQeZrGvbewdW. These triangles have three sides, and three angles and one or more measurements of these triangles coincide with each other. 28 Determine the congruence of two triangles by using one of the five congruence techniques (SSS, SAS, ASA, AAS, HL), given sufficient information about the sides and/or angles of two congruent triangles. Third Angles Theorem (add to Theorems, Postulates and Definitions Card) – Sep 18, 2014 · G. B. 9 - Properties of Kites Practice4. Get the answer key for Chapter 4 triangle congruence to understand the concepts and solve practice problems in geometry. To see and record your progress, log in here. Students have the entire class period to finish the quiz. This quiz covers concepts like Side-Side-Side, Side-Angle-Angle, and the properties of similar triangles. Strengthen your understanding of geometric building blocks and improve your theorem-proving skills. And depending on the ©y O2O0m1R15 FKiuftEaR QSPoZfRtew8aVrSeA cLSLoCU. Whether you’re a geometry enthusiast or a student looking to reinforce your skills, these questions will help you master the principles of triangle congruence. Then name the congruence postulate or theorem you used. . 92 - Theorem 5. J and K JK is included between angles SSA What is not a triangle congruence theorem The right angle is included between the legs Why does the LL theorem hold for proving right triangles congruent SAS Answer Key -Triangle Congruence Proofs - Extra Practice - Free download as PDF File (. Students are asked to show their work and thoughts for Explore postulates and theorems on congruent triangles, with clear examples, practice problems, and detailed step-by-step solutions. X I sMOapdpeB cwJist0hv yIknYfEizn7iftve3 iG6efoXmbe4tbrpyb. Study with Quizlet and memorize flashcards containing terms like Reasons that Prove Line Congruency, Reflective Property, Transitive Property and more. Triangle Congruence I. Learn SSS, SAS, ASA, AAS, and HL congruence rules through interactive exercises and solutions. 6. (LL Theorem) and more. The page begins with exercises requiring students to identify appropriate congruence methods (SSS, SAS, ASA, AAS, or HL) for given triangle pairs. Use this immensely important concept to prove various geometric theorems about triangles and parallelograms. zt SAS 1. Compare two triangle and identify which property makes them congruent, ASA, SAS, or SSS. Feb 8, 2021 · Identify congruent parts of congruent triangles Write proofs involving congruent triangles Use the properties of parallelograms, rectangles, rhombuses, squares, trapezoids, and isosceles trapezoids to solve problems Classify a quadrilateral as a parallelogram, rectangle, rhombus, square, trapezoid, and/or isosceles trapezoid Triangle Congruence Theorems Checkpoint QuizTriangle Congruence Theorems Checkpoint Quiz Aug 24, 2025 · Use this congruent triangles quiz to practice SSS, SAS, ASA, and AAS and spot matching sides and angles. Mastering the techniques to prove triangle congruence not only enhances problem-solving skills but also lays a Aug 28, 2025 · Test your knowledge on sss and sas congruence with this 20-question high school quiz. ’ You can prove that triangles are congruent by SSS, SAS, ASA, AAS, or HL. Perfect for geometry students looking to reinforce their understanding. In an isosceles triangle, the base angles will always be ________. Be aware that some people have trouble with proofs because they fail to see how statements can be used to form new statements, as demonstrated by this diagram. 1: Triangle MidsegmentsGeome Day 1 SWBAT: Use properties of congruent triangles. There are 8 proofs total. , Given: Angle A B C and Angle F G H are right angles; Line segment B A is parallel to line segment G F; Line segment B C is-congruent-to line segment G H Prove: Triangle A B C Is-congruent-to Triangle F G H Step 1 Study with Quizlet and memorize flashcards containing terms like What is the side opposite the right angle. Tell which theorem (SSS, SAS, ASA, AAS, HL) can be used to prove the triangles congruent. Use the worksheet to identify study points to Find more proofs and geometry content at mathplane. It is the longest side of the triangle?, The other two sides are called what?, If two legs of one right triangle are equal to two legs of another triangle, then the two right triangles are congruent. Oct 18, 2024 · This quiz will challenge your understanding of the various criteria and methods used to prove that triangles are congruent. Understand concepts better by attempting these practice problems on Geometry. Find other quizzes for Mathematics and more on Wayground for free! These worksheets and lessons focus on proving triangle congruence through the use of side-side-side and side-angle-side theorems. Determine which of the triangle congruence theorems (SSS, SAS, ASA, AAS, or HL) can be used, if any, to prove the pair of triangles congruent. PRACTICE: Triangle Proofs Worksheet Part 1 3. lfllz bckxwn kkmvk jlpa gmm thrzui lmrplp tco lzzvml fedjfy