Question

The area of a semi circle of radius 2.8cm is:

Answer 1

(Area of a circle in terms of radius)

Area = π·r2 = 3.14·2.82 = 24.63 square cm

(Area of a circle in terms of diameter)

Area = π·(d2)2 = 3.14·(5.62)2 =

3.14·(2.8)2 = 24.63 square cm

(Area of a circle in terms of circumference)

Area = C24π = 17.5924π = 309.41(4·3.14) = 309.4112.56 = 24.63 square cm

so answer is 24.63