Question

find the area of semicircle when its diameter is 2.8​

Answer 1

Diameter = 2.8

Radius (r) = 2.8/2 = 1.4

We know, Area of semi-circle

= 1/2 × Pie × r²

= 1/2 × 22/7 × 1.4 × 1.4

= 11 × 0.2 × 1.4

= 3.08

Answer 2

Answer:

Radius=2.8÷2=1.4

Therefore,area of the semicircle=1/2

$\pi \\ r {?}^{2}$

1/2×22/7×1.4 ×1.4=3.08