Area of circle = Pi/4 x diameter2 = Pi/4 x 225 = 56.25 Pi = 176.7146 square metres.
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Circumference of a circle: 2*pi*radius or diameter*pi
The area of a circle with a diameter of two cm is about 3.1416 cm.
The area of a circle if the diameter was s 7ft is 38.48ft
Area of a circle = (1/4) x (pi) x (square of the diameter)
The area of a circle with a diameter of 10 centimeters is: 78.54 cm2