Question

find the perimeter of each of the following shape take Pi is equal to 3.14​

Answer 1

Answer:

a. 2*2*pi*r

$4 \times 3.14 \times 4= 16\times 3.14 \: cm = 50.08 \: cm$

b. 1/2*pi*r

$\frac{1}{2} \times 3.14 \times 16 = 8 \times 3.14 \: mm \\ = 25.12 \: mm$

c. pi*r+15*2+40

$3.14 \times 20 + 30 + 40 \\ = 70 + 62.8 \\ = 132.80 \: m$