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sqdancefan 1 year ago
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a. 314.2 in²

b. 36 m²

c. 60 m²

Step-by-step explanation:

The areas of these plane figures can be found by substituting the given dimensions into the area formula.

### a.

The area of a circle can be found from its diameter to be ...

A = (π/4)d²

A = (π/4)(20 in)² = 100π in² ≈ 314.2 in²

__

### b.

The area of a parallelogram can be found as ...

A = bh

A = (9 m)(4 m) = 36 m²

__

### c.

The area of a triangle can be found from ...

A = 1/2bh

A = 1/2(15 m)(8 m) = 60 m²

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