Question

What. Is the perimeter of the sector with radius 21 cm and sector angle 60 degree

Answer 1

the answer is 53 centimeters

Answer 2

curved perimeter of 60 degrees sector = perimeter of 360 deg. circle /6
perimeter of circle = 2*22/7*21 = 132 cm
perimeter of 60 deg. sector = curved perimeter + 2r
=132 +2*21 = 174 cm