Question

What will be the area of a semi circle whose diameter is 2.8 cm

Answer 1

Radius = d/2

= 2.8cm/2
= 1.4cm.

Since A of semicircle = pi* r^2 /2

= 22/7 * 1.4 * 1.4 /2 cm^2

= 3.08 cm^2.

Hope it's helpful to u.

Answer 2

diameter = 2 * radius= 2.8
radius(r) = 2.8/2 = 1.4 cm
area of semi circle =( π×r^2)/2
= 3.07 cms
hope it helps