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7.3 similar triangles.notebook January 10, 2017 1/10/17 Warm Up Problem A movie theater screen has a width of 45 ft and a length of 25 ft. Which TV screen is a similar rectangle to the movie screen? 27 in 20 in 36 in 36 in 7.3 similar triangles.notebook January 10, 2017 7.3 similar triangles.notebook January 10, 2017 Section 7.3 - Proving Triangles Similar Goals: Identify similar triangles Use similar triangles to solve problems Are these similar triangles? 7.5 5 10 7.3 similar triangles.notebook January 10, 2017 Proving Triangles Similar - Shortcuts Postulate 71 Angle Angle Similarity (AA~) If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar. 7.3 similar triangles.notebook January 10, 2017 Proving Triangles Similar - Shortcuts Theorem 71 Side Angle Side Similarity (SAS~) If one angle of one triangle is congruent to one angle of another triangle and the sides including the two angles are proportional, then the triangles are similar. L H 10 5 J F G 3 K 6 7.3 similar triangles.notebook January 10, 2017 Proving Triangles Similar - Shortcuts Theorem 72 Side Side Side Similarity (SSS~) If the corresponding sides of two triangles are proportional, then the triangles are similar. Y B 4 3 A 5 12 9 C X 15 Z 7.3 similar triangles.notebook January 10, 2017 Proving Triangles Similar - Shortcuts Determine whether each pair of triangles can be proven similar by AA, SSS, or SAS. 7.3 similar triangles.notebook Assignment: 7.3 Worksheet (front side only) January 10, 2017