Question

which of the following is a chord that is not a diameter of the circle above?
ab
ad
cb
ac

Explanation:

Step1: Recall the definitions

A chord is a line segment with both endpoints on the circle. A diameter is a chord that passes through the center of the circle.

Step2: Analyze each option

• \(AB\): Not a chord (one - endpoint \(A\) on the circle, but \(B\) is not an endpoint of \(AB\) in the chord - sense here. Wait, no, re - check. Wait, actually, in the circle, a chord connects two points on the circle. \(AD\): \(D\) is the center. A diameter is a special chord. \(AD\) is a radius (since \(D\) is the center and \(A\) is on the circle). \(AC\): Passes through the center \(D\), so it is a diameter. \(CB\): Connects two points \(C\) and \(B\) on the circle and does not pass through the center \(D\).

Answer:

C. CB