Area of a circle = pi x (radius)2
So, if the radius is 4 cm, the area is pi x 42= 50.265 cm2
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4 cm radius = Area of 50.26548 sq. cm.
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
The area of a sector in a circle if the radius is 4 cm and the arc has degree 120 is: 16.76 cm2
A circle with a radius of 6 cm has an area that is about 113.1 cm. 3/4 of that is 84.825 cm
A circle that is 25.13272 cm in circumference.