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

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A = 1385cm2

A = 1,385.4 cm2

Radius of circle: 132/2pi = 21cm to the nearest integer

The radius of any circle is the straight line distance from the centre of the circle to any point on the circumference of the circle. The radius being 21 cm makes no difference to the definition of the radius; it just means that the straight line distance from the centre of that circle is 21cm away from any point on the circumference of that circle. The radius of a circle with a radius of 21 cm is 21 cm.

A = 346.36 cm2

area of a circle and the question is d=21cm

The area of a circle if the radius is 9m 254.5m2

The area of a circle with a radius of 14.4 is 651.4

The area of a circle of radius 21 is 1386

The radius of a circle with the area of 36 is 3.385

Area of a circle = pi*radius squared

The area of a circle if the radius is 7yd is 153.9yd2

A circle with a radius of 10m has an area of 314.16 m2

The area of a circle with a radius of 2m is: 12.566 m2

If the area of a circle is 40.7 the radius is: about 3.6 (3.599)

The radius of a circle when the area is 96 is 5.528

If you triple the radius of a circle, the area will increase by 9. Area is proportional to the square of the radius.

A= Area of the circle¶= Pi (About 3.14)r= Radius squared (Radius times radius)3.14 * Radius squared

The approximate diameter of a circle whose circumference is 21cm is: 6.68cm

For a circle or radius r, the area is given by: area = {pi}r2 (ie pi times the radius squared)

Area of circle = pi*(radius)2

In a circle, the area of the circle is pi times the radius squared

To increase the area of a circle you must increase the radius.

If a circle's area is 3.14 (Pi), its radius is: about 1.

The area of a circle with a radius of 14 is: 615.75 square units.