If the circle's diameter is D, the radius is D/2.

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Multiple Choice

If the circle's diameter is D, the radius is D/2.

Explanation:
The radius is half of the diameter. If the diameter is D, then D = 2r, so the radius r = D/2. Therefore, D/2 is the correct value for the radius. The other options would respectively represent the diameter (D), twice the diameter (2D), or an unrelated expression (√D).

The radius is half of the diameter. If the diameter is D, then D = 2r, so the radius r = D/2. Therefore, D/2 is the correct value for the radius. The other options would respectively represent the diameter (D), twice the diameter (2D), or an unrelated expression (√D).

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