If a circle has a radius of 7, what is the diameter?

To determine the diameter of a circle when the radius is given, it's important to know the relationship between the diameter and the radius. The diameter of a circle is twice the length of the radius.

In this case, the radius is 7. To find the diameter, you multiply the radius by 2:

Diameter = 2 × Radius

Diameter = 2 × 7

Diameter = 14

Thus, the diameter of the circle is 14. Understanding this relationship is crucial for solving various problems involving circles, as the diameter is a key measurement in geometry that can affect other calculations, such as the area and circumference.