Question

Find the area of semicircle whose diameter is14

Answer 1

Diameter = 14 unit

∴ Radius = (14/2) unit

              = 7 unit

Area of a semi-circle = 1/2 πr²+ 2r

∴ Area = 1/2 ×(22/7)× (7)² + (2×7)

           = (22×49×2×7)/(7×2) +(2×7)

          = (22×49) + (2×7)

           = 1078 + 14

           = 1092 unit²

∴ The area of the semi-circle is 1098 unit².

Answer 2

Step-by-step explanation:

Diameter = 14 unit

∴ Radius = (14/2) unit

              = 7 unit

Area of a semi-circle = 1/2 πr²+ 2r

∴ Area = 1/2 ×(22/7)× (7)² + (2×7)

           = (22×49×2×7)/(7×2) +(2×7)

          = (22×49) + (2×7)

           = 1078 + 14

           = 1092 unit²

∴ The area of the semi-circle is 1098 unit².