1. 8-3 Proving Triangles Similar M11.C.1 2.9.11.B
Objectives:
To use and apply AA, SAS and SSS similarity statements.

2. Angle-Angle Similarity Postulate (AA~)
If two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.
△TRS ~△PLM

3. Example (AA~) Explain why the triangles are similar
What is the similarity statement?

4. Side-Angle-Side Similarity Theorem
If an angle of one triangle is congruent to an angle of a second triangle, and the sides including the two angles are proportional, then the triangles are similar.

5. Example
Are the triangles similar by (SAS~)? Explain.

6. Side-Side-Side Similarity Theorem (SSS~)
If the corresponding sides of two triangles are proportional, then the triangles are similar.
Side-Side-Side Similarity Theorem (SSS~)

7. Example: SSS~
Are the triangles similar using the SSS Similarity Theorem?

8. Finding Lengths in Similar Triangles
Find DE and show triangles are similar.