answersLogoWhite

0

the area of a circle is represented by the following equation; A=pi*R2 where A is area, pi is the number pi (3.1415926.......for most high school maths, 3.14 is suitable) and R is the radius. So, square your radius, and multiply it by pi.

User Avatar

Wiki User

12y ago

What else can I help you with?

Related Questions

What is the area of a circle with a radius of 21 centimeters?

About 1385.44cm2


What is the area of a circle with the radius of 21?

The area of a circle of radius 21 is 1386


What is the area of a circle with a radius of 21cm?

The area of a circle is calculated using the formula A = πr^2, where A is the area, π is a constant approximately equal to 3.14159, and r is the radius of the circle. Plugging in the radius of 21cm into the formula, we get A = 3.14159 x (21)^2 = 1385.44 square centimeters. Therefore, the area of a circle with a radius of 21cm is 1385.44 square centimeters.


What is the approximate area of a circle whose radius is 21 cm?

A circle with a radius of 21 cm has an area of ~1,385.44 square cm


What is the base area of a cylinder with the diameter of 21?

Its just the area of a circle 21 inches or 21 centimeters? area of a circle is (pi)*r2 where pi = 3.1415.... and r = radius thus A = (3.1415)*(diameter/2)2 u can figure out the answer from that with a calculator


What is the area of a circle with a radius of 21 feet?

Using 3.14 as Pi the area of circle is: 1384.74


What is the area of a circle if the radius is twenty-one?

A circle with a radius of 21 units has an area of 1,385.44 square units.


What is the area of a circle when the radius is 21?

Area = pi*212


What is the area of a circle if the radius is 21?

Using 3.14 as Pi the area of circle is: 1384.74


What is the area of a circle with a radius of 21 cm?

About 1385.44cm2


The circumference of a circle is 132cm what is the radius of the circle in centimeters?

To find the radius of a circle when given the circumference, you can use the formula for the circumference of a circle: C = 2πr, where C is the circumference and r is the radius. Given that the circumference is 132 cm, you can plug this value into the formula: 132 = 2πr. To solve for the radius, divide both sides by 2π: r = 132 / (2π) ≈ 21 cm. Therefore, the radius of the circle is approximately 21 centimeters.


How many miles in a 21 mile radius?

If the area is a circle and the radius of the circle is 21 miles, the distance around the circle (circumference) is 131.95 miles. The area of that circle is 1,385.4 square miles.