Question

Find the area of the circle. Round your

answer to the nearest tenth.
1.
4 cm
2.
12 m

Answer 1

1. 50.3 cm²
2. 113.1 m²

Explanation:

You want the areas of two circles, one with radius 4 cm, the other with diameter 12 m.

Area

The area of a circle is given by the formula ...

A = πr²

The radius (r) is half the diameter, so the second circle's radius is 6 m.

1) 4 cm

The area is ...

π(4 cm)² = 16π cm² ≈ 50.3 cm²

2) 6 m

The area is ...

π(6 m)² = 36π m² ≈ 113.1 m²

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