The area of a circle with radius r is pi*r*r where pi = 3.1416 approx.
When r = 6 cm, the area is 113.1 sq cm.
A circle with a radius of 21 cm has an area of ~1,385.44 square cm
Using 3.14 as Pi the area of circle is: 32.153600000000004
Area of a circle in square cm = pi*radius squared
A circle with a radius of 19 cm has an area of 1,134.11 square cm.
A circle with a radius of 2 cm has an area of 12.57 square cm.
A circle with a radius of 21 cm has an area of ~1,385.44 square cm
The radius of a circle whose area is 3.14 square centimeters is: 1 cm
Area of a circle = pi (3.14) times the radius squared.
Using 3.14 as Pi the area of circle is: 28.259999999999998
Using 3.14 as Pi the area of circle is: 32.153600000000004
Area = pi*r2 = 651.44 cm2
The area of a circle = pi x radius squared where pi = 3.1416 therefore area = 3.1416 x 4 x 4 = 50.26 square cm
Area of a circle in square cm = pi*radius squared
4 cm radius = Area of 50.26548 sq. cm.
A circle with a radius of 3 cm has an area of 28.27 square cm.
A circle with a radius of 2 cm has an area of 12.57 square cm.
A circle with a radius of 25 cm has an area of 1,963.5 square cm.