Question

The diameter of circle measure 18mm.what is the circumference of the circle?​

Answer 1

Answer:

56.52 mm

The formula of the circumference of a circle is 2pi*r since diameter is the radius * 2 we'll divide 18 by 2 to get the radius which is 9. Now we'll multiply 9 by pi which is 3.14 and we'll get 28.26 and how multiply by 2 which is 56.52

Answer 2

Answer:

18π mm

Step-by-step explanation:

C=2πr

d=2r, 18=2r, r=9

C=18π mm