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The perimeter of a figure is the distance around the figure. The perimeter, P, and area, A, of common figures are shown.
Circle
P= 2 r
A=r
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Rectangle
P= 2h
+ 2b
A=bh |
Square
P = 4h
A = h
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Right triangle
A = bh/2
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Triangle
A = bh/2 |
Parallelogram
A = bh
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