Question

find the difference the area of a sector of angle is 120 and its corresponding major sector if a circle of radius 21 cm

Answer 1

Answer:

346.5 sq cm

the unknown symbol used is a multiplication sign... there is some error in the solution

Step-by-step explanation

Area of a sector = $\frac{θ}{360}$ × \pi × $r^{2}$

Difference in area =  $\frac{θ}{360}$ × \pi × $r^{2}$ -  $\frac{Ф}{360}$ × \pi × $r^{2}$

                              =  $\frac{ \pi × r^{2}}{360} ×$ ( θ - Ф )[/tex]

                              =  22/7 × $\frac{21 × 21}{360}$ × ( 240 - 120)

                             =  22/7 × $\frac{21 × 21}{360}$ × ( 120)

                             = 22/7 × 21×21 /4

                             = 346.5 sq cm