Question

find area of sector of a circle whose angle is 70° and diameter is 8 cm​

Answer 1

Answer:

theta = 70 degree

so

$theta \: \: x = \frac{70 \times \pi}{180} \: radian \\ \\ \: radius \: r = \frac{8}{2} = 4 \: \: cm \\ \\ \: so \: area \: of \: circle \: \: = \frac{1}{2} {r}^{2} x \\ = \frac{1}{2} \times {4}^{2} \times \frac{70 \times \pi}{180} \\ = 9.77 \: \: {cm}^{2}$