Question

Find the area of this semi-circle with diameter, d = 12cm.

Give your answer as an expression in terms of π.

Answer 1

Answer:18π cm^2

Explanation:

diameter=12

Radius=diameter ➗ 2

Radius=12 ➗ 2

Radius=6

Area of semicircle=0.5 x π x radius x radius

Area of semicircle=0.5xπx6x6

Area of semicircle=18π cm^2

Answer 2

6pi

Explanation:

Area of a circle = 2pi*r

d = 12

r = d/2

r=6

Area of semicircle = (2pi *r)/2 = pi*r

pi*6 = 6pi