Radius = 166.53 feet (to 2 dp).
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Radius of a circle= Perimeter of the circle/2*pi Radius is half the diameter Radius is the length of a straight line from the center point of the circle to the edge of the circle.
radius = diameter/2
The diameter of a circle is twice the radius. A circle with a radius of 9 would have a diameter of 18. (9*2=18).
Radius of the circle: 3.65/2 = 1.825 inches
circumference of circle= 2*3.14*radius 31.4=2*3.14*r r=5 app