This math topic focuses on teaching how to determine the diameter of a circle from its radius. The questions test the student's ability to apply the basic geometric rule that the diameter is twice the radius. Each question is structured with a given radius and multiple choice answers, where students must identify the correct relationship between the radius and the diameter. This practice helps reinforce their understanding of circle geometry fundamentals.
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If 'r' is the radius, what is the diameter 'd'?
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