Question

Find the perimeter and area of the following shape represented by bold lines.​

Answer 1

Answer:

Total area = 544.25 cm^2

Total perimeter =  90 cm

Step-by-step explanation:

perimeter of semicircle which has length as diameter = $\pi$*21/2 = 22/7 * 21/2 = 33cm

perimeter of semicircle which has length as diameter = 7$\pi$ = 22/7 * 7 = 22cm

Total perimeter = 14+21+33+22 = 90 cm

area of semicircle which has length as diameter = 1/2$\pi$ 21/2 * 21/2 = 1/2*22/7*21/2*21/2 = 173.25cm^2

perimeter of semicircle which has length as diameter = 1/2$\pi$*7*7

= 1/2 * 22/7 * 7 * 7 = 77 cm^2

Total area = 14* 21 + 173.25 + 77 = 294 + 250.25 = 544.25 cm^2