radius *2 = diameter so then plug the radius in...
4*2=8
8 is the diameter of the figure.
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The radius is half the diameter. So, if the diameter is 8, then the radius is 4.
8 units; the diameter of a circle is twice its radius.
32cm, the radius is half of the diameter
Diameter: 2*4 = 8 cm
Length of a radius is always half the diameter of a circle. This means that the circle has a radius of 2cm.