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10-4 Perimeters and Areas

10-4 Perimeters and Areas. of Similar Figures. You will use the ratio of two similar figures to find their perimeter and area. Theorem 10-7. Perimeters and Areas of Similar Figures. If the similarity ratio of two similar figures is a / b , then the ratio of their perimeters is a / b

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10-4 Perimeters and Areas

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  1. 10-4 Perimeters and Areas of Similar Figures

  2. You will use the ratio of two similar figures to find their perimeter and area.

  3. Theorem 10-7 Perimeters and Areas of Similar Figures If the similarity ratio of two similar figures is a/b, then the ratio of their perimeters is a/b the ratio of their areas is a2/b2

  4. 5m 13m Find the ratio for the perimeter for the following similar figures. 5/13

  5. 5m 13m Now, find the ratio for the area for the following similar figures. 25/169

  6. 5m 13m If the area of the larger figure is 439m2, find the area of the smaller figure. 25/169 = x/439 169x = 10975 169 169 x = 65m2

  7. Assignment:

  8. Assignment Workbook Page 445 all

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