the third angles are congruent

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## the third angles are congruent

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**Find these definitions on page 198 and fill them out in your**notes. the third angles are congruent C F Polygons that have congruent corresponding parts. That is, corresponding vertices, angles, and sides are congruent. DEF GHI**When you name congruent polygons, always list corresponding**vertices in the same order. T C BC QJ**Read through the example on the top of page 199 and then**fill in the blanks below. 180 m<M 48 48 67 115 65**Proving Triangles Congruent**• We are able to conclude that two triangles are congruent if their corresponding sides and corresponding angles are congruent to each other.**Now read through Example 3 on pg. 199**<DCE <DEC Is NOT DE DC EC <DEC <CDE <ACB ABC EDC**Oh YEAH? Prove IT!**Given • Reflexive Given Definition of perpendicular lines. All right angles congruent. <CGN congruent to <DGN congruent. 4-1 congruent.**On Your Own for this one:**Given Theorem 4-1 – If 2 angles are congruent in 2 triangles, then their 3rd angles are congruent. <ABE congruent to <DBC Given Definition of congruent triangles**Homework **• Geometry 1st and 3rd period • Practice 4.1, pg. 201, 16, 18, 32, 34 • Honors Geometry 5th period • Practice 4.1, pg 201, 16, 18, 32, 34, 44