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Mathematics for IGCSE & O level - Mensuration (Section 8 - No. 37)

What is the area of a circle with a radius of 5 cm?
15.7 cm²
78.5 cm²
31.4 cm²
25 cm²

Объяснение

Use the formula A = πr²: A = π * 5² ≈ 78.5 cm²

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