Question

Find the area of a sector of circle with radius of the circle is 21 cm and the area of the sector 60 degrees

Answer 1

area of the sector = theta ' 360 x$\pi$r^2
                             = 60/360 x 22 /7 x 21 x 21
                             =1 / 6 x 22 x 3 x21 
                             =11 x 21
                             =231 cm^2