the circumference of a circle is 22cm. find its area and also find the area of the semicircle
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Answer:
38.5cm² , 19.25cm²
Step-by-step explanation:
Circumference of a circle = 2πr
22 = 2×22/7×r
r = 22×7/2×22 = 7/2
Area of circle = πr² = 22/7×7/2×7/2 = 38.5cm²
Area of semi circle = 38.5÷2 = 19.25cm²
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