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The radius of a circle is 2 inches. What is the circle's area?

2 Answers

1 vote

Answer:

A= 12.57 inches squared

Explanation:

The formula for the area of a circle is A=πr2. Substitute 2 for r, square it, and multiply it by pi (3.14.) The answer is 12.57 inches squared.

User Rugnar
by
4.4k points
3 votes

Answer:


\boxed {\tt a\approx 12.57 \ in^2}

Explanation:

The area of a circle can be found using the following formula.


a= \pi r^2

The radius of the circle is 2 inches.


r= 2 \ in

Substitute the value into the formula.


a=\pi ( 2 \ in)^2

Evaluate the exponent.

  • (2 in)²= 2 in * 2 in = 4 in²


a= \pi(4 \ in^2)

Multiply.


a=12.5663706 \ in^2

Round to the nearest hundredth. The 6 in the thousandth place tells us to round the 6 to a 7.


a\approx12.57 \ in^2

The area of the circle is about 12.57 square inches.

User Drew Gaynor
by
4.9k points