I. Identify what is being described/defined. Choose your answer from the box. 1. Part of a line that has two endpoints Coplanar points 2. Union of two noncollinear rays with common endpoint. Point 3. It has no dimension, can be represented by a dot. space Plane. 4. A flat surface that extends in all directions. Angle 5. Points that are not contained in the same line Midpoint Collinear points 6. Points that lie on the same plane Noncolinear points 7. A point that divides a segment into two congruent parts Angle bisector Line segment 8. A ray that divides the angle into two congruent measures 9. Points that lie on the same line. 10. The set of all points.