You are a moron but I'll answer, the diameter is the enitire distance across the circle across the middle point and the radius is the distance from the middle point ot the edge and therefore always half in a perfect circle
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The diameter of a circle is twice its radius
diameter = 2 X radius
The radius of a circle is half the diameter so if the radius of a circle is r, then the diameter is 2r.
The diameter of a circle is twice its radius
The radius of a circle is always half of the diameter. If the diameter is 85.4, the radius is 42.7.