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Mathematics for IGCSE & O level - Mensuration (Section 10 - No. 14)

What is the area of a circle with a radius of 7cm? (Use π=22/7)
44 cm²
154 cm²
308 cm²
616 cm²

解释

Area = π * r² = (22/7) * 7 * 7 = 154 cm²

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