The circumference of a circle is 2*pi*radius or diameter*pi
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Circumference is pi * d. Solve for d. d = Circumference / pi
pi x diam
C= pi * D This is the formula for circumference.
The formula is: circumference = 2 x pi x radius. As always when you use a formula, plug in the values you know and solve for the ones you don't. So plug in 46 for the circumference and solve for the radius. (You'll get that the radius = (circumference)/(2pi)).
the formula for the circumference isc=2(pi)rSince you already have the circumference, just plug it into the formula, and solve:3=2(pi)r divide by 2pi0.47746483 = r