What is the area of a circle with radius 3?

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Prepare for the AMSOC 26-003 Module A Test. Utilize flashcards and multiple choice questions with hints and explanations. Ace your exam!

Multiple Choice

What is the area of a circle with radius 3?

Explanation:
Area is found by multiplying π by the radius squared. With a radius of 3, square it to get 9, then multiply by π to get 9π. That’s the correct area. The other numbers come from common mix-ups: 27π would come from using r cubed instead of r squared; 3π would come from using only r (not squaring); and 6π would be the circumference 2πr, which is a different measurement.

Area is found by multiplying π by the radius squared. With a radius of 3, square it to get 9, then multiply by π to get 9π. That’s the correct area. The other numbers come from common mix-ups: 27π would come from using r cubed instead of r squared; 3π would come from using only r (not squaring); and 6π would be the circumference 2πr, which is a different measurement.

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