
Please help to check if my steps and ans are correct.as the ans key is different from my working.thank you.
Please help to check if my steps and ans are correct.as the ans key is different from my working.thank you.
Radius of big semi circle = 2m
Radius of small semi circle = 1m
Perimeter of the shaded area
= Circumference of big semi circle + Circumference of small semi circle + 2
= π(2) + π(1) + 2
= 3π + 2 m #