Question

Here is semicircle with radius as 1.2x10-4 km. Calculate the perimeter of semicircle in cm.(2d.p.) Calculate the area of semicircle in sq.cm.(2d.p.)​

Answer 1

Answer:

1.2×10^-4 km=1.2×10^-4×10^5 cm=120 cm

perimeter=πr + 2r

=(22/7)×120+2×120

Area=πr^2/2={(22/7)×(120)^2}/2