Area of a circle = (pi) x (radius)2
Radius = 1/2 of the diameter
Area of this particular circle = (pi) x (7)2 = 49 pi = 153.938 square centimeters (rounded)
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40.8cm
The area of a circle whose radius is 19 centimeters is: 1,134 cm2
The circumference of a circle whose diameter is 1.5 ft is: about 4.712 feet.
4.6; the diameter of a circle is twice its radius.
The diameter of any circle is twice the radius. Hence, for this particular circle, the diameter is 106.