Workkeys Math Practice Test

To find the circumference of a circle, you can use the formula:

\[ \text{Circumference} = \pi \times \text{diameter} \]

In this case, the diameter of the circle is given as 10 cm. Plugging this value into the formula, and using the approximation for π as 3.14, you can calculate the circumference as follows:

\[ \text{Circumference} = 3.14 \times 10 \text{ cm} \]

Carrying out the multiplication:

\[ \text{Circumference} = 31.4 \text{ cm} \]

This result indicates that the circumference of a circle with a diameter of 10 cm is indeed 31.4 cm.

The other options presented do not align with this calculation based on the given diameter and the approximation for π. Consequently, the choice that reflects the correct circumference is 31.4 cm.