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HW-pg. 234-236 (1-10, 23-25, 28-29) 4.1-4.3 Quiz THU 11-13 p. 5, FRI 11-14 p. 3 & 7 www.westex.org HS, Teacher Websites 11-5-14 Warm up—Geometry CPA 1. Which statement is true? (Note: diagram is not drawn to scale) (A) q || r (B) q || s (C) r || s (D) p || q GOAL: I will be able to: 1. use properties of congruent triangles. HW-pg. 234-236 (1-10, 23-25, 28-29) 4.1-4.3 Quiz THU 11-13 p. 5, FRI 11-14 p. 3 & 7 www.westex.org HS, Teacher Websites Name _________________________ Geometry CPA 4.3 Congruent Triangles GOAL: I will be able to: 1. use properties of congruent triangles. Date ________ Geometric figures are congruent if they are the same size and shape. _________________ and __________________ are in the same position in polygons with an equal number of sides. Two polygons are ____________ if and only if their corresponding sides are congruent. Thus triangles that are the same size and shape are congruent. To name a polygon, write the vertices in ___________________. For example, you can name polygon PQRS as QRSP or SRQP, but not as PRQS. P Q S R In a congruence statement, the order of the vertices indicates the ___________________. Example 1: Naming Congruent Corresponding Parts Given: ∆PQR ∆STW Identify all pairs of corresponding congruent parts. YOU TRY: If polygon LMNP polygon EFGH, identify all pairs of corresponding congruent parts. (Draw a picture) Example 2: Using Corresponding Parts of Congruent Triangles (CPCTC) Given: ∆ABC ∆DBC. Find the value of x. YOU TRY: A) Given: ∆ABC ∆DBC Find mDBC. B) Given: ∆ABC ∆DEF Find the value of x. 4-3 Practice 1. ∆ABC ∆JKL and AB = 2x + 12. JK = 4x – 50. Find x and AB. Given that polygon MNOP polygon QRST, identify the congruent corresponding part. 2. NO ____ 3. T ____ EXIT TICKET Name _______________________ ∆ABC and ∆DEF are congruent. Are angles C and E corresponding angles? If not, state two angles that do correspond to each other. A F C EXIT TICKET B E D Name _______________________ ∆ABC and ∆DEF are congruent. Are angles C and E corresponding angles? If not, state two angles that do correspond to each other. A F C EXIT TICKET B E D Name _______________________ ∆ABC and ∆DEF are congruent. Are angles C and E corresponding angles? If not, state two angles that do correspond to each other. A F C EXIT TICKET B E D Name _______________________ ∆ABC and ∆DEF are congruent. Are angles C and E corresponding angles? If not, state two angles that do correspond to each other. A F C B E D