Question

What is the perimeter of the sector with radius 21cm and sector angle 60 degree?

Answer 1

this is the answer given by the GOLDA ( brainly teacher ) 

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Radius = 10.5 cm and Sector angle = 60°

Perimeter of a sector of a circle = [(theta/360°)*2πr] + (2r)

⇒[(60/360)*2*22/7*10.5] + (2*10.5)

⇒ 1*462/6*7 + 21

⇒ 462/42 + 21

⇒ 11 + 21

⇒ 32 cm

So, the perimeter of sector is 32 cm

Answer 2

Answer:

Hope it will help you

Step-by-step explanation:

-Required perimeter = perimeter of arc + 2.radius

Perimeter- 60/360 × 2×22/7×21 +(2×21)

By solving  this we get

Answer - 64 CM...

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