Question

the area of a sector of a circle with the central angle of 140° is 70m². find the radius of the circle

Answer 1

Answer:

Radius is 7.57m

Step-by-step explanation:

See area of 140°sector=70m^2

Therefore, area of 360°sector=(70*360/140)m^2

Now area of a circle of radius r =pie*r^2

Therefore, atp,

Pie*r^2=70*(360/140)

r^2=(70*360*7)/(140*22)

=1260/22

r=7.57m