Question

What's the circumference of a

circle with a diameter of 9 inches?
Use 3.14 for it.
C =

Answer 1

28.27433

Explanation:

C≈28.27in Diameter

Using the formulas

C=2πr

d=2r

Solving forC

C=πd=π·9≈28.27433in Diameter

Answer 2

C = 2 π r

π = 3.14

2r = diameter

r = 4.5 in

C = 2 × 3.14 × 4.5

C = 28.26