The radius of a circle with a circumference of 42 meters is about 6.685 meters.
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The circumference of a 42-inch diameter circle is: ~131.95 inches.
It is pi*42 = 131.9 inches approx.
21 inches.
Area of a circle = pi x (radius)2So, if the radius is 4 cm, the area is pi x 42= 50.265 cm2
The distance around the perimeter.c=distance aroundr=The radius of a circle is the length of the line from the center to any point on its edgeD= the distance across the circlepi x diameter, or the equivalent 2 x pi x radius.