The area of the semicircle and composite circle are 89.97 square feet and 51 π/2 square cm respectively
Area of a circle and semicircle
The formula for calculating the area of circle and semi circle is expressed as:
Area of a circle = πr²
Area of a semicircle = πr²/2
where
r is the radius of a circle
6a) The given shape is a semi circle
A = πr²/2
A = π(11)²/2
A = 121(3.14)/2
A = 189.97 square feet
6b) For the composite circles, the area will be expressed as;
A = π(10)²/2 - π(7)²/2
A = 100π/2 - 49π/2
A = 51 π/2 square cm
Hence the area of the semicircle and composite circle are 89.97 square feet and 51 π/2 square cm respectively
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