Question

classify each figure as a line, ray, or line segment. then, show how to write it.
figure\ttype\thow to write it
(a) \t○line
●ray
○line segment\t\stackrel{\
ightharpoonup }{ba}

Explanation:

Step1: Identify figure type

The figure has arrows on both ends, extending infinitely in two directions, so it is a line.

Step2: Correct notation for the line

A line through points A and B is written with a double-headed arrow above the two points, which can be $\overleftrightarrow{AB}$ or $\overleftrightarrow{BA}$.

Answer:

Type: line
How to write it: $\overleftrightarrow{BA}$ (or $\overleftrightarrow{AB}$)