Question

find the circumference of circle whose dismeter is 18​

Answer 1

Answer:

diameter =18

radius =18/2

= 9

circumfere= 2πr

= 2*22/7*9

= 56.59cm

Answer 2

Given

$\bold{ Diameter \ of \ the \ circle} = 18 \ cm\\=> \bold{ Radius \ of \ the \ circle} = 9 \ cm$

SOMETHING YOU NEED TO KNOW

$\boxed{\bold{Area \ of \ the \ circle} = \pi r^{2}}}\\\boxed{\bold{Circumference \ of \ the \ circle} = 2\pi r }}}$

$\bold{Circumference \ of \ the \ circle} = 2\pi r$

                                                 $= 2 * 3.14 * 9$

                                                 $= \boxed{\boxed{\bold{56.52 \ cm}}}}$