Area of a circle is pi r^2
diameter is twice the radius.
3.14*8*8=64*pi or approximately 200.96
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The area of a circle with a diameter of 16 inches is: 201.1 square inches.
The area of the circle if the diameter is 16 inches is: 201.1 square inches.
The circumference of a circle whose area is 16 times the area of a circle whose diameter is 1.4m is: 17.6 cm
The area of a circle of radius r is pi*r*r
The perimeter of a full circle (circumference) is "pi" times the diameter. So the perimeter of a semi-circle will be half that; Perimeter = (pi/2) x (diameter).