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Find Radius
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Radius = Diameter ÷ 2
Radius = 32 ÷ 2
Radius = 16
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Find Area
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Area = πr²
Area = π x 16²
Area = 256π mm²
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Answer: 256π mm²
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OQ = 8 + 9 = 17
x^2 = 17^2 - 8^2
x^2 = 289 - 64
x^2 = 225
x = 15
She needs 4 groups at the most, having 6 kids leftover, 6×4=24, not that hard