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Warm up: p. 202 "Quiz 1" OBJECTIVE: You will learn to identify corresponding parts of congruent triangles. Section 54 __________________ congruent triangles corresponding parts B A F E C D 1 Corresponding Parts of Congruent Triangles are Congruent (CPCTC) If the corresponding parts of two triangles are congruent, then the two triangles are congruent. Example 1: If PQR = MLN, name the congruent angles and sides. N Q L P R M Example 2: The corresponding parts of two congruent triangles are marked on the figure. Write a congruence statement for the two triangles. B D C A E 2 Example 3: RST is congruent to XYZ. Find the value of n. T Y 90° S (2n + 10 )° 50° 40° R X Z Guided Practice: 1. Explain what it means when one triangle is congruent to another. 2. Describe how transformations are used to determine whether triangles are congruent. If ABC = DEF, name the corresponding side or angle. 3. F 4. A 5. AC 6. EF 3 7. If XYZ = EDF, name the congruent sides and angles. Then draw the triangles. Use arcs and tic marks to show the congruent sides and angles. Complete each congruence statement. 8. ABC = _________ 9. CBA = _______ C C D B E F E A F A B D 4 Do you have any Vocab questions? OBJECTIVE: HOMEWORK: p. 206 207 # 11 27, 29 34 5