1. Changes in Dimensions

2. 5 ft 8 ft EX1)Suppose the dimensions of the rectangle are doubled. What effect would this have on the perimeter? On the Area? 8+8+5+5P= 26 ft P= A= 8 X 5 40 ft 2 16+16+10+10P= 52 ft P= A= 16 X 10 160 ft 2 10 ft 16 ft Scale factor = 2 26 X 2= 52 40 X 2 = 160 ft 2 40 X 4

3. Perimeter changes using the scale factor Area changes using the scale factor squared Regular pentagon 10 cm P= 50 cm What are the new dimensions with a scale factor = 1/2 P= 50 / 2 P= 25 cm 8 in 12 in A= 96 cm 2 A= 96 / 2 2 A= 24 cm 2 A= 96 / 4

4. Assignment

5. Changes in Dimensions Date _____________

6. EX1)Suppose the dimensions of the rectangle are doubled. What effect would this have on the perimeter? On the Area? P= A= P= A=

7. Perimeter changes using the scale factor Area changes using the scale factor squared Regular pentagon P= What are the new dimensions with a scale factor = 1/2 P= A= EX2) EX3)