Question

find the circumference of the following circles if diameter 4cm

Answer 1

$2\pi \: r \: = 2 \times 22 \div 7 \times 2 \\ \: \: \: \: = 88 \div 7 \\ \: \: \: \: \: = 12.57 \: cm$
hope this helps you

Answer 2

Hey user here is your answer..

------->Diameter=2×radius

◆radius=diameter/2

◆r=4/2

◆r=2cm

Circumference of circle=2πr

◆r=2cm

So,

◆circumference of circle=2×22/7×2

=88/7

◆Circumference of circle=12.57cm

Thanks☺️

#skystar