Transcript Lines

POINTS, LINES, &
PLANES
9-1
BASIC GEOMETRIC FIGURES
NAME
Point
SAMPLE
SYMBOL
DESCRIPTION
Point A
Location in space
Line
AB
Plane
ABCD
(the 4
corners)
Line Segment
Series of points that extends in
opposite direction without end
Flat surface with many lines
Part of a line with 2 endpoints
LM
Ray
QR
Part of a line with only 1
endpoint
Examples…
H
W
T
• 1. Name 4 points
• 2. Name 4 different segments
• 3. Name 1 ray
K
Parallel Lines
• Two lines that lie in the same plane and DO NOT intersect
Perpendicular Lines
• Lines that criss-cross (intersect) to form a 90 degree
angle
Skew Lines
• Lines that do not lie in the same plane; they are NOT
parallel and they are NOT perpendicular