Question

If the circumference is 18in , what is the diameter ?

A)6 in
B) 4in
C)5.73 in
D)5 in
E)8.5 in

Answer 1

C

Explanation:

Circumference can be found using

c=
`\pi`d

We know the circumference is 18, so we can substitute it in

18=
`\pi`d

We want to find d, so we have to isolate it.

To do this, divide both sides by pi

d=5.72957795131

Rounded to the nearest hundreth

d=5.73

Diameter is 5.73 inches, or choice C

Answer 2

the answer is c

Explanation:

you work backwards so divide it by pi so 3.14 in this case and then you have the diameter