Question

lesson 6: circles
defining diameter, radius, and circumference
which of the following does not represent the radius of the following circle?
a. ac
b. cr
c. ba
d. cb

Explanation:

Step1: Recall radius definition

The radius of a circle is the distance from the center of the circle to any point on the circle.

Step2: Analyze each option

In the given circle with center \(C\), \(AC\), \(BC\), \(CD\) are radii as they connect the center \(C\) to a point on the circle. But \(BA\) is a diameter as it is a line - segment passing through the center with endpoints on the circle.

Answer:

C. BA