Answer: B - A circle with a radius of 3 cm has an area of 28.26 cm2. The formula for the area of a circle is ~3.14 multiplied by the radius squared. 3² = 9, so 3.14 x 9 is 28.26 cm2.

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Praxis II Mathematics Content Knowledge Exam Prep

Category - Free Praxis II Math Practice Test Questions

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A radius of a circle is 3 cm. What is its area?

3.14 cm²
28.26 cm²
282.6 cm²
2.826 cm²

Explanation

Answer: B - A circle with a radius of 3 cm has an area of 28.26 cm². The formula for the area of a circle is ~3.14 multiplied by the radius squared. 3² = 9, so 3.14 x 9 is 28.26 cm².

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