Question

for 3 marks only. plz give me as fast as you can

Answer 1

first we have to find one segment
swgment =
$\alpha \div 360 \times \pi \times r \times r - r \times r \times \sin( \alpha \div 2 \times \cos( \alpha \div 2) )$
28.5
area of shaded region=2×area of segment
2×28.5
=57cm2