Basic Area Formulas to Know

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7 Terms

1
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area of a circle

A = πr2

2
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area of a semicircle

A = (1/2)(πr2)

3
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area of a trapezoid

A = (1/2)(b)(h1 + h2)

4
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area of a triangle

A = (½)(b)(h)

5
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area of a rectangle

A = (l)(w)

6
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area of a square

A = s2

7
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area of an equilateral triangle

A = (¼)(s2)(√3)