Question

find the area of sector whole radius 7cm and central angle 180°?​

Answer 1

Answer:

area of sector = ∅/360*πr²

so 180/360*22/7*49

1/2*22/7*49

11/7*49

11*7

77 cm²

this is you answer

Answer 2

Given that,

• radius = 7
• central angle = 180°

Answer:

Area of a sector of a circle of radius 'r' and angle

$θ= \frac{θ}{360} \pi {r}^{2} </p><p>$

Hence, area of the sector of the circle of radius 7 cm and angle 60°

$= \frac{180}{360} \times \frac{22}{7} \times 7 \times 7$

$= \frac{1}{2} \times \frac{22}{7} \times 7 \times 7$

$= 11 \times 7$

$= 77 {cm}^{2}$

Hope it helps you