Two points $\mathrm{A}$ and $\mathrm{B}$ in a plane determine a unique line segment.

Two intersecting lines intersect at a point.

Two intersecting planes intersect at a point.

If points $\mathrm{A}, \mathrm{B}, \mathrm{C}$ are collinear and points $\mathrm{C}, \mathrm{D}, \mathrm{E}$ are collinear then the points $\mathrm{A},\mathrm{B},\mathrm{C},\mathrm{D},\mathrm{E}$ are collinear.

One and only one ray can be drawn with a given endpoint.

One and only one line can be drawn to pass through two given points.

An unlimited number of lines can be drawn to pass through a given point.

A _____ has a definite length. $($line$/$line segment$)$

A ray has _____ endpoint. (two/ one)