Question

Circumference of a semi circular piece of a design is 72cm find area

Answer 1

$\frac{\pi}{2} \times ( {72 \times \frac{22}{7} )}^{2}$

Answer 2

Answer:

Step-by-step explanation:

Circumference of a semi circular == π × d

22/7 d = 72

d =72 x 7/22

d = 22.9

r = 22.9/2

r=11.45

area will be

area of a semicircle is A = pi x r^2/2

= 22/7 x 11.45 x 11.45 /2

area = 207 (approx.)