If the diameter of a circle is 14 cm, what is the radius?

The radius of a circle is defined as half of its diameter. To find the radius, you simply divide the diameter by 2. In this case, the diameter is given as 14 cm.

When you divide 14 cm by 2, you get:

14 cm / 2 = 7 cm.

This means the radius of the circle is 7 cm. Recognizing that the radius is directly calculated from the diameter is crucial in understanding the geometric properties of circles. The other options do not represent the radius since they either equal the diameter, which is not appropriate for radius measurement, or are simply unrelated values in this context.