Question

The angle of a sector of radius 10.5cm is120° . calculate the perimeter of the sector

Answer 1

Answer:

Angle of sector=120°

radius=10.5cm

perimeter of sector=2πrtheta/360°

=2×22/7×120/360

=44/21 cm Ans

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Answer 2

Answer:

43 cm

Step-by-step explanation:

angle of sector =120° = 2π/3

radius = 10.5 cm

we know that length of arc, l = radius x angle made by arc (in radian)

So, perimeter of the sector = l + 2r

= 10.5 x (2π/3) + 2 x 10.5 cm

= 22 + 21 cm

= 43 cm