Question

find the perimeter of the sector of a circle of radius 9 cm with Central angle 70 degree​

Answer 1

Answer:

11cm

Step-by-step explanation:

perimeter of sector = x°/360 × 2πr

$= \frac{70}{360} \times 2 \times \frac{22}{7} \times 9 \\ = \frac{7 \times 2 \times 22 \times 9}{36 \times 7} \\ = \frac{2 \times 22 \times 9}{36} \\ = \frac{2 \times 22}{4} \\ = \frac{22}{2} \\ = 11cm$