Question

find the length of the arc if the perimeter of sector is 65cm and radius is 20cm​

Answer 1

Answer:

Perimeter of a sector of circle =31 cm

Radius =6.5 cm

Arc length = 31−(6.5+6.5)=18 cm

Now, Area of sector =

2

1

×Arc length × radius=

2

1

×18×6.5=58.5 cm

2