Which of the following statements is true of chords?

a chord is a line segments. a chord connects two points on a circle. a chord can be a radius of a circle. a chord can be a diameter of a circle. a chord divides a circle into two regions

All of those are true, except the one about the radius.  Because alternate definition of diameter uses the idea of chord. So, both ends of a chord have to be on the circle, but one end of a radius is at the center, so a radius can't be a chord.