Question

Which circle C shows a chord that is not a diameter?

Circle C is shown. A line is drawn from one side of the circle to the other side and goes through point C.

Circle C is shown. A line is drawn on the outside of the circle and intersects the circle at one point.

Circle C is shown. A line is drawn from point C to a point on one side of the circle.

Circle C is shown. A line goes from one point on the circle to another point on the circle.

Answer 1

The fourth circle.

Reason: a chord has both endpoints on the circle.
- The first passes through C (the center), so it's a diameter.
- The second is a tangent (one point).
- The third is a radius (center to circle).
- The fourth joins two points on the circle but doesn't go through the center, so it's a chord that is not a diameter.