alleryStart learning →A circle has a radius of 10 centimeters. Using pi as approximately 3.14, what is its area?
A31.4 sq cm
B62.8 sq cm
C314 sq cm
D628 sq cm
Answer & Solution
Correct answer: C. 314 sq cm
1. The formula for area is pi times the radius squared.
2. Square the radius first: 10 x 10 = 100.
3. Multiply by pi: 3.14 x 100.
4. This gives 314.
5. So the area is approximately 314 square centimeters.
_Source: OpenStax Prealgebra (CC BY 4.0), Ch 5 "Decimals", section 5.3 Decimals and Fractions_
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