1. No warmup Grab a note sheet off of table and have out your challenge packets

2. 10.4 Perimeters and Areas of Similar Figures Objective: To find the perimeters and areas of similar figures.

3. Theorem 10.7 Perimeters and Areas of Similar Figures

4. Example The trapezoids at the right are similar. a.Find the ratio of their perimeters. b.Find the ratio of their areas.

5. You Try: The two triangles are similar. a.Find the ratio of their perimeters. b.Find the ratio of their areas.

6. Example: For each pair of similar figures, the area of one figure is given. Find the area of the larger figure.

7. Example: Each pair of figures below are similar. Find the ratio of the perimeters. 1.Two regular hexagons with areas 8in. 2 and 32in. 2 2.Two squares with areas 81cm 2 and 25cm 2 3.Two triangles with areas 10 ft 2 and 360 ft 2 4.) Two circles with areas 128 π cm 2 and 18 π cm 2