Radius Calculator: Compute Dimensions of a Circle –
2020-4-4 · r = c 2 π. r=c/2pi r = c/2π. Dimensions of a circle: O - origin, R - radius, D - diameter, C - circumference ( Wikimedia) Area, on the other hand, is all the space contained inside the circle. It's also straightforward to find the area if you know the radius: a = π r 2. a = pi r^2 a = πr2.
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