Circumference = Pi multiplied by the diameter.
C = (3.1415)(15 in.)
= 47.12 in.
Therefore, the circumference of a circle with a diameter of 15 in. and a radius of 7.5 in. is approximately 47.12 inches.
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A circle with a radius of 22 inches has a circumference of 138.23 inches.
Diameter of a circle = 2*radius Diameter of a circle = circumference/pi
If the radius of a circle is four inches the diameter, circumference and area are:Diameter = 8 inchesCircumference = 25.13 inchesArea = 50.27 square inches
Take "pi" times the diameter of the circle. Pi = 3.14159 (ALWAYS) If circle has a diameter of 10cm, circumference 31.41cm If circle has a radius of 2inches, the circumference is 12.57 inches. (radius = 2, diameter = 4)
Circumference of any circle = 2*pi*radius or diameter*pi