Question

find the perimeter of a circle with radius 21cm and center O

Answer 1

Answer:

answer is 132 cm

Step-by-step explanation:

given:

radius of circle = 21 cm

perimeter of circle = circumference of circle

circumference of circle = 2πr

=2×22/7×21

=132 cm

so circumference or perimeter of circle is 132 cm