the area of a semi circular region is 77cm square. find its perimeter
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As we know,
Area of semicircle = ½πr²
So,
½πr² = 77
=> ½ × 22/7 × r² = 77
=> 11/7 × r² = 77
=> r² = 77 × 7/11
=> r² = 49
=> r = 7
Perimeter of the semicircular region = πr
= 22/7×7
= 22cm
Area of semicircle = ½πr²
So,
½πr² = 77
=> ½ × 22/7 × r² = 77
=> 11/7 × r² = 77
=> r² = 77 × 7/11
=> r² = 49
=> r = 7
Perimeter of the semicircular region = πr
= 22/7×7
= 22cm
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