A circle has a radius of 5 units. What is the diameter?

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Multiple Choice

A circle has a radius of 5 units. What is the diameter?

Explanation:
Diameter equals twice the radius, because it stretches across the circle through its center from one side to the other. With a radius of 5 units, the diameter is 2 × 5 = 10 units. So the diameter is 10 units. The other options correspond to different multiples of the radius: 5 is the radius itself, 15 would imply a radius of 7.5, and 20 would imply a radius of 10.

Diameter equals twice the radius, because it stretches across the circle through its center from one side to the other. With a radius of 5 units, the diameter is 2 × 5 = 10 units. So the diameter is 10 units. The other options correspond to different multiples of the radius: 5 is the radius itself, 15 would imply a radius of 7.5, and 20 would imply a radius of 10.

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