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Mathematics for IGCSE & O level - Mensuration (Section 12 - No. 13)

If a circle has a diameter of 6cm, what is its area?
18.84 cm²
28.26 cm²
9.42 cm²
113.04 cm²

Forklaring

Area= πr², radius = diameter/2, Area= 3.14 * (6/2)^2= 28.26

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