Answer:
18π mm
Step-by-step explanation:
C=2πr
d=2r, 18=2r, r=9
C=18π mm
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
