Question

what is the formula of circumference of circle if diameter is given​

Answer 1

Formula of circumference of circle if diameter is given is

pie × diameter

pie can be 22/7 or 3.14

Answer 2

Answer:

pi d

Step-by-step explanation:

given

diameter = d

and d= 2r

so circumference can br

$cir \: = 2\pi \: r \\ cir = 2r\pi \\ cir = \pi \: d$