d=2r
diameter=2 times the radius
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The formula for the circumference of a circle is the same, whatever its diameter. Circumference = pi*diameter.
pi*diameter = circumference Rearrange the formula so as the diameter is the subject of the formula: diameter = circumference/pi diameter = 7/pi = 2.228169203
The diameter of a circle is twice its radius.
what is the formula for a cylinder with a diameter of 75 ft and a height of 66ft
The diameter of a circle is twice its radius, or 2r.