3.14 x R2 (diameter)2
3.14 x 16= 5024
5024 x 5024= 2524056
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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
In this case, the radius is easiest calculated from the diameter. The radius is simply half the diameter.
r = 8 inches d = 16 inches