1.

The radius of a sector is 21 cm and it central angle is 120 find the perimeter of sector​

Answer»

answer

44

explanation

circumference=2×(22/7)×r

here,r=21

so,circumference=44/7×21

=132

C of SECTOR=(angle/360)×total c

=(120÷360)×132

=132÷3

=44



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