Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 20) | ExamPlay

Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 20)

What is the relationship between the radius (r) and diameter (d) of a circle?

d = r

d = 2r

r = 2d

r = d²

Explanation

The diameter is twice the radius.

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