Question

please give me answer of this question​

Answer 1

Answer:

Perimeter is 66cm

Step-by-step explanation:

hope this will help u

Answer 2

Solution :

We have,

BC = r_1 = radius of semicircular ARC

= 14/2

= 7 cm

AC = r_2 = radius of semicircular APB

= 7/2 cm

Now,

Perimeter of shaded region

= Perimeter of (arc APB + arc BSD + arc APB + arc QCD

= perimeter of (2 arc ARP + 2 arc ACB)

(arc ARC = arc BSD , arc CQD = arc APB)

= 2 x ½ x 2πr_1 + 2 x ½ x 2πr_2

= 2πr_1 + 2πr_2

= 2π(r_1 + r_2)

= 2πr x 7 + 7/2 cm

= 2π. 21/2

= 21π cm

= 21 x 21/7

= 66 cm

∴ Perimeter of shaded region is 66cm