Question

The diameter of a circle is 8 mm. What is the circumference of the circle?

25 and 1/7mm?

50 and 2/7mm?

11/28mm?

Or

19 and 1/4mm?

Answer 1

25 and 1/7 mm

Explanation:

Diameter = circunference / π

π = 3.1416 aprox.

Then:

8 = citcunference / 3.1416

8 * 3.1416 = circunference

25.1428 = circunference

1/7 = 0.1428

Then:

25.1428 = 25 + 1/7

= 25 1/7

Answer 2

25.12 rounded.

Explanation:

C = 2
`\pi`r

C=
`\pi`d

C =
`\pi`(8)

C = 25.12 rounded.