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if the radius of a cicle is 12 cm, is it possible for the length of the diameter be to 20 cm?why?
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Radius is the distance from the centre of the circle to the edge. Therefore if the radius is 12cm, then the diameter will be twice as long (24cm).
D=2r
The radius is by definition, 1/2 the diameter of a circle, so the answer to this question is no.
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