Circumference of circle: 2*pi*36 = 226.195 cm rounded to 3 decimal places
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The radius of a circle with a circumference of 36cm is: 5.729 cm
2.7
It's 18 cm. The radius is half the diameter of a circle. Half 36 cm is 18 cm.
you multiply the diameter by pi which is approximately 3.14
A circle of radius r has a circumference of 2*Pi*r and an area of Pi*r*r, where Pi is the constant which is approximately 3.14159. Use the first equation to calculate the radius and then the second to calculate the area.