Question

Find the difference of the areas of a sector of angle 120° and its corresponding
major sector of a circle of radius 21 cm.
plzz fast ♥ ♥

Answer 1

Difference in areas = (22/7 x 21 x 21 - 120/360* 22/7 x 21 x 21) cm2
= (1 - 1/3)(66x21) xm2
= 66x7x2 cm2
= 924 cm2

Answer 2

Given theta = 120 and radius r = 21cm.

We know that Area of the sector = theta/360 * pir^2

                                                        = 120/360 * 22/7 * 21 * 21

                                                       = 462 cm^2.


Hope this helps!