## What is the area of the circumference is 10 pi?

So, the radius is 10pi=2pir. If we divide 10pi by 2pi to get the radius by itself, r=5. The area of a circle, meanwhile, is 2pi(r^2). 5 squared is 25, so the area becomes 50pi, as 2×25=50.

## How do you find circumference when given the area?

Like many things in math, there are multiple solutions to this problem. The formula C = 2√πA is designed to find a circle’s circumference using the area (A). Alternatively, you can solve the equation A = πR2 in reverse to find R, then plug R into the circumference equation.

20 pi

31.42cm

## What is the radius of a 5cm circle?

r = 0796 is right answer.

## What is the radius of a circle with a circumference of 18 pi?

To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.

## What’s the area of an 18 inch circle?

Area of a 18 Inch Circle

254.47 square inches
1.7671 square feet
0.19635 square yards
1,641.7 square centimeters
0.16417 square meters

## What is the area of the diameter is 9?

63.62 square centimeters (cm²)

## What is the circumference of a 12 inch diameter?

Circumference & Areas

Size in Inches Circumference Inches Area in Square Inches
12 37.700 144.000
12 1/4 38.480 150.060
12 1/2 39.270 156.250
12 3/4 40.060 162.560

## What is the area of 11 cm?

1.4925 square inches (in²)

## What is the circumference of 11 cm?

The circumference is approximately 68.1 .

## What is called the length of a circle?

The length of a circle is usually called it’s circumference.