200m radius describes a circle which from it's outer edge to it's center is 200 meters. The circle itself, therefore, would be 400 meters across.
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Well, darling, the area of a circle with a radius of 200m is approximately 125,663.7 square meters. To convert that to hectares, you divide by 10,000, so the area is roughly 12.57 hectares. So, there you have it, about 12.57 hectares of circle goodness for you to frolic in.
Length of a radius is always half the diameter of a circle. This means that the circle has a radius of 2cm.
The formula for area of a circle is TTr2.This means that we multiply 3.14(the rounded off nunber for pi) by the radius and radius(3.14xradiusxradius).If the diameter is given,divide it by 2 to get the radius.
Depending on what "a circle of 480 feet" means, the radius will have different values. If the radius is 480 feet, then that is your answer. If the diameter is 480 feet, then its radius is 480/2 = 240 feet. If the circumference is 480 feet, then its radius is 480/2(pi) = 240/(pi) = 76.39 feet.
No, 40 mile radius is an area unit whereas 40 mile is distance. This means that something 30 miles from a location can be said to be in a 40 mile radius from that location.