1. Aim: How do we prove triangles are similar? Do Now: Find the value of x

2. Aim: How do we prove triangles are similar? Definition of similar figures: What will we need to show in order to prove triangles are similar? Example: Is parallelogram ABCD similar to parallelogram EFGH?

3. Aim: How do we prove triangles are similar? Methods to prove triangles similar: Angle-Angle (AA) Example: Given: AB is parallel to DC Prove: Triangle ABE ~ Triangle CDE StatementReason

4. Aim: How do we prove triangles are similar? Methods to prove triangles similar: Side-Side-Side (SSS)

5. Aim: How do we prove triangles are similar? Methods to prove triangles similar: Side-Angle-Side (SAS) Example: Given: Diagram below Prove: Triangle ABC ~ Triangle BED StatementReason