Question

A sector is cut from a circle of radius 21 cm the angle of the sector is 150° find the length of its arc and area​

Answer 1

Answer:

The length of arc l and area A of a sector of angle θ in a circle of radius r are given by,

l= θ/360 ×2πr

and A= 0/360×πr ²respectively.

Here, r=21 cm and θ=150

∴l= 360/150 ×2× 7/22 ×21=55 cm

and

A= 36/150 × 22/7×21² =1155/2

=577.5 cm²

Step-by-step explanation:

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