1. U W VX Z Y 7.5 5 12 6 XYZ 5/6 10 9 100 Warm Up

3. Angle-Angle (AA~) Similarity Postulate If two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar. A BC D EF

4. Side-Side-Side (SSS~) Similarity THM If the corresponding sides of two triangles are proportional, then the triangles are similar. A BC D E F

5. Side-Angle-Side (SAS~) Similarity THM If the lengths of two sides are proportional and the included angle is congruent, then the triangles are similar A BC D E F

6. Ex. Determine whether the triangles are similar. If so, tell which similarity test is used and complete the statement. F G H K L M 43° 68° W V U 7 11 X Y Z 5 3

7. Prove that RST~ PSQ R S T P Q 12 4 5 15 1. Two sides are proportional 2. Included angle is congruent SAS~