Question

find the perimeter of each figure

Answer 1

1. we know that perimeter of circle = 2πr and here r = 21m ⇒ 2πr = 131.946

but the given figure is 1/4th of the circle ⇒ so perimeter = 131.946/4 = 33

2. we know that perimeter of circle = 2πr and here r = 0.7m ⇒ 2πr = 4.398

but the given figure is 3/4th of the circle ⇒ so perimeter = 3/4 × 4.398 = 3.298

3. Perimeter of the triangle = 7 + 7 + 10.5 = 24.5

Perimeter of the semicircle is πr = 16.5

so total perimeter = 24.5 + 16.5 =41

Answer 2

Answer of ques 12, part - (iii)