Question

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

Answer 1

Answer:

A= 12.57 inches squared

Step-by-step 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.

Answer 2

Answer:

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

Step-by-step 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.