Chapter 10 Perpendicular and Parallel Line Segments
* Line segments can go up and down, from side to side, and in every direction.
Perpendicular line segments - Line segments that meet at right angles.
Drawing triangle - This instrument is used to draw perpendicular and parallel line segments.
Parallel line segments - Parallel line segments are parts of lines that are ALWAYS the same distance apart.
Base - This is the straightedge of a drawing triangle; the side of the drawing triangle.
Horizontal lines - Horizontal lines are parallel to the floor.
Vertical lines - Vertical lines are the lines that are perpendicular to the floor.