Question

Find the perimeter of the sector of a circle of radius 9 cm w
of a circle of radius 9 cm with central angle 70°​

Answer 1

$\huge\underline\green{\sf Answer:-}$

★${\boxed{\sf Perimeter\:of\:sector\:of\:Circle=10.99cm}}$

$\huge\underline\green{\sf Solution:-}$

★Given :-

Radius (r) = 9cm

$\sf{\theta}$= 70°

Perimeter of Circle = ?

FORMULA TO FIND PERIMETER OF A SECTOR OF CIRCLE IS :-

★${\boxed{\sf Perimeter\:of\: sector\:of\: Circle={\frac{\theta}{360°}}×2πr}}$

ON PUTTING VALUE :-

$\large\implies{\sf {\frac{70}{360}}×2×3.14×9}$

★$\red{\boxed{\sf Perimeter\:of\:a\:sector\:of\:circle=10.99cm}}$

Answer 2

Answer:

perimeter of Sector/=2r+Arc length

Arc length=2πr xX/360 = 2x3.14x9x70/360=10.99

perimeter=2x9+10.99

29cm