The diameter of a circle is 10 cm. What is its area? A)78.5 cm² B)100 cm² C)7)8 cm² D)20 cm²

Name: The diameter of a circle is 10 cm. What is its area? A)78.5 cm 2 B)100 cm 2 C)7)8 cm 2 D)20 cm 2
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Quizplus · Accepted Answer

If the diameter of a circle is 10 cm, its area is 78.5 cm2. Since the formula for the area of a circle is 3.14 ($\pi$) r², you can start by dividing the diameter in half in order to get the radius. In this case, 10 ÷ 2 = 5. And 5² = 25, so 3.14 x 25 = 78.5 cm2.

The Diameter of a Circle Is 10 Cm