take the diameter (say there is a circle and you want to find the radius of it, first you would need the diameter, in order to get the diameter you need to measure the circle by taking a ruler then putting two 'corduns' in the middle of the corners of it and BAM! you got the radius! the formula is " g = (2) (47) y = x. "
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diameter = 2*radius
Well to find the radius it is diameter/2.
Well the formula for the radius of the square is radius squared * pi (3.14)So find the radius (which is half of the diameter. which is exactly half of the shape)and do the formula. end the answer with "m".
it is have the diameter
you have multiplythe radius by 2 to get the diameter