Question

what is the diameter of a circle if its radius is 5 units?
a. 20 units
b. 15 units
c. 10 units
d. 5 units

Explanation:

Step1: Recall the formula for diameter

The formula for the diameter \(d\) of a circle in terms of the radius \(r\) is \(d = 2r\).

Step2: Substitute the given radius value

Given \(r = 5\) units. Substitute \(r = 5\) into the formula \(d=2r\), so \(d = 2\times5\).

Step3: Calculate the diameter

\(d=10\) units.

Answer:

C. 10 units