Circumference = 7*pi which is about 22 inches
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The approximate diameter of a circle whose circumference is 21cm is: 6.68cm
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 circumference of a circle is its diameter times pi, which is the same as twice the radius times pi.A = 2r (pi)In this instance, the circumference is 32(pi) inches(about 100.53 inches)
The area of a circle whose diameter is 12 inches is: 113.1 square inches.
The radius is 7 inches.