The document defines various geometric terms including planes, faces, edges, vertices, diagonals, parallel lines, intersecting lines, perpendicular lines, and skew lines. Specifically, it notes that a face is the side or base of a figure, an edge is where two faces meet, a vertex is where three or more edges meet, a diagonal connects two non-adjacent vertices, parallel lines do not intersect and are in the same plane, intersecting lines cross or touch, perpendicular lines intersect at a right angle, and skew lines do not intersect and are not in the same plane.

1. tarungehlots
PLANES AND SKEW LINES
Any side of a figure that is flat and forms a
Face
side or a base.
Edge The place where two faces meet.
The place where three or more edges meet.
Vertex
(The corners)
A line that connects two non-adjacent
Diagonal
vertices.
Lines in the same plane that do not
Parallel Lines
intersect.
Intersecting
Lines that cross or touch each other.
Lines
Perpendicular Two lines that intersect to form a right
Lines angle.
Two lines that do not intersect and are not
Skew lines
in the same plane.