Question

find the area of a semicircle whose diameter is 7 cm​

Answer 1

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• Area of Semi-circle =2πr2=722×249=77cm2²

Answer 2

Step-by-step explanation:

radius r = 7/2

area of semicircle=πr²/2

= π × (7/2)²/2

= 22/7 ×(7/2×7/2)/2

= 22×7/8

= 11×7/4

= 77/4 cm²