Question

Find the perimeter of a sector whose radius and central angle are 18cm,210degree respectively

Answer 1

Answer:

Perimeter=arc length +2 radii

(210x2x22x18/360) +36

66 +36=102cm

Answer 2

The perimeter of sector is 66 sq. cm.

Step-by-step explanation:

Since we have given that

Radius = 18 cm

Central angle = 210°

So the perimeter of sector would be

$\dfrac{\theta}{360^\circ}\times 2\pi r\\\\=\dfrac{210}{360}\times2\times\dfrac{22}{7}\times 18\\\\=\dfrac{7}{12}\times\dfrac{44}{7}\times 18\\\\=\dfrac{11\times 18}{3}\\\\=11\times 6\\\\=66\ cm^2$

Hence, the perimeter of sector is 66 sq. cm.

# learn more:

Find the area of sector of a criclevof radius 18cm with central angle 35

https://brainly.in/question/2623365