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If the radius of a circle is 9 cm what is the area and circumference?

Answer 1

Kennedy Adams

Area: #81\pi#
Circumference: #18pi#

You just need to use the formulas:

Area = #r^2 * \pi = 9^2 * \pi = 81 * \pi# Circumference = #2*r*\pi = 2*9*pi = 18*\pi#

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Answer 2

Eva Adamson

The area of the circle is (81\pi , \text{cm}^2) and the circumference is (18\pi , \text{cm}).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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