Question

Find the area of sector whose central angle and radius are 60^o and 21 cm respectively.
`(pi = 22/7)`

Answer 1

Area =`theta/360 xx pi"r"^2`

⇒ A `= 60/360 xx 22/7 xx 21^2`

⇒ A` = 1/6 xx 22/7 xx 21 xx 21`

⇒ A = 11 × 21 

⇒ A = 231 cm²