Jun Heng's answer to Au's Primary 6 Maths Measurement Singapore question.
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Perimeter of semicircle= ½πd = ½(22/7)(28) = 44cm
Perimeter of figure = 44×2+40×2 = 168cm
Area of semicircle = ½πr² = ½(22/7)(28/2)² = 308cm²
Area of rectangle = 44×28 = 1120cm²
Area of figure = 308×2+1120 = 1736cm²
Perimeter of figure = 44×2+40×2 = 168cm
Area of semicircle = ½πr² = ½(22/7)(28/2)² = 308cm²
Area of rectangle = 44×28 = 1120cm²
Area of figure = 308×2+1120 = 1736cm²
Date Posted:
1 year ago
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