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

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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

The area of a circle of radius 21 is 1386

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A = 1,385.4 cm2

A circle with the radius of 21cm would have an area of approximately 1384.74 cm. You would find this by using the equation of pi*(radius^2) = pi*(21^2).

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.

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

A = 346.36 cm2

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

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

The area of a circle of radius 21 is 1386

Area of a circle = pi*radius squared

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

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