Question

which is true regarding chords and diameters of circles?
both chords and diameters have two endpoints on a circle. diameters must intersect the center of a circle.
both chords and diameters have two endpoints on a circle. chords must intersect the center of a circle.
chords have two endpoints on a circle. diameters have one endpoint on a circle and one at the center.
chords have one endpoint on a circle and one at the center. diameters have two endpoints on a circle.

Explanation:

A chord is a line segment with both endpoints on the circle. A diameter is a special chord that passes through the center of the circle. So, both chords and diameters have two endpoints on the circle, and diameters must intersect the center.

Answer:

Both chords and diameters have two endpoints on a circle. Diameters must intersect the center of a circle.