To determine the radius of a circle when its diameter is given, you can use the relationship between the diameter and the radius. The radius (r) is half of the diameter (d).
Here’s a detailed, step-by-step solution:
1. Identify the given diameter of the circle: [tex]\( 22 \)[/tex] millimeters.
2. Understand the formula for the radius in terms of diameter:
[tex]\[
r = \frac{d}{2}
\][/tex]
3. Substitute the given diameter into the formula:
[tex]\[
r = \frac{22 \text{ mm}}{2}
\][/tex]
4. Perform the division:
[tex]\[
r = 11 \text{ mm}
\][/tex]
Therefore, the radius of the circle is 11 millimeters. The correct answer is:
O 11 mm
