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11.3 Perimeters and Area of Similar Figures

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1 11.3 Perimeters and Area of Similar Figures
Similar Polygons

2 Remembering Similar Polygons
Similar polygons have all the Angles congruent and the Sides have the same ratios. (like these three houses)

3 Remember this Theorem If two polygons are similar (equal angles and corresponding sides in ratios), then the perimeters ratio is the same as the scale factor. Perimeters are 24:16 same ratio as 3:2 for the sides

4 Theorem If two polygons are similar (equal angles and corresponding sides in ratios), then the Area ratio is the same as the scale factor squared. (in the regular hexagons)

5 Find the Area and Perimeter
The given figures are similar How would you find the area?

6 Find the Area and Perimeter
The given figures are similar

7 Find the Area and Perimeter
The given figures are similar

8 Find the Area and Perimeter
The given figures are similar

9 Homework Page # 8 – 24,


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