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Notes 8C Proving Triangles similar.notebook January 17, 2012 Bell Work 1. Write a Similarity Statement and similarity ratio. F B 9 A 12 6 C y 3 2. Using proportions to solve for x and y. D x E Notes 8C Proving Triangles similar.notebook January 17, 2012 Notes 8C Proving Triangles similar.notebook January 17, 2012 Notes 8C: Proving Triangles are similar Triangle similarity postulates: AA: If two angles of one triangle are congruent to two corresponding angles of the other triangle, then the triangles are similar. SAS: If two sides of a triangle are proportional to two corresponding sides of the other triangle, and they share the angle in between, then the two triangles are similar. SSS: If all three sides of a triangle are proportional to the corresponding sides of the other triangle, then the triangles are similar. Notes 8C Proving Triangles similar.notebook January 17, 2012 Example: Determine the postulate that proves the triangles are similar. 1. 3. L 4 1 J K 5 12 Y 8 2 X 2 Z 10 1 6 2. Given AE ll CD 4. C 3 2 B A D 6 E 9 Notes 8C Proving Triangles similar.notebook 5. 35 35 7 7 5 25 January 17, 2012 Notes 8C Proving Triangles similar.notebook Assignment Worksheet 8C 1-29, and 33 January 17, 2012 Notes 8C Proving Triangles similar.notebook January 17, 2012 Notes 8C Proving Triangles similar.notebook January 17, 2012