Question

if the length of an arc of sector of a circle is 20 cm and if radius is 7 find the aera of the sector​

Answer 1

$Area \: of \: sector \: = \frac{1}{2} \times radius \times length \: of \: sector \\ Area \: of \: sector \: = \frac{1}{2} \times 7 \times 20 \\ Area \: f \: sector \: = 7 \times 10 = 70cm$

Answer 2

Answer:

Area of sector is 7×10=70sq cm