Symbols & Terms
Write a paragraph using each of the
following words:
point
line
plane
segment
ray
angle
Identify examples of points, lines, and
planes in each of these pictures.
Symbols & Terms
Explain, in your own words, what
point, line and plane mean.
Description -
- Real world example
a location in space
Description -
a set of points that
extends in two directions
without end; it has length
but no thickness
point
Drawing -
line
- Notation
Drawing -
Description -
a flat surface that extends
in all directions without
end; it has no thickness
- Notation
- Real world example
plane
Drawing -
- Real world example
- Notation
Symbols & Terms
Description -
- Real world example
a location in
space
Drawing –
point
- Notation
Symbols & Terms
Description -
a set of points that
extends in two
directions without end;
it has length but
no thickness
Drawing -
line
- Real world example
- Notation
Symbols & Terms
Description -
a flat surface that
extends in all
directions without
end; it has no
thickness
Drawing -
plane
- Real world example
- Notation
Symbols & Terms
Collinear (co-linear) means on
the same line.
–Any two points are collinear.
–More than two points may or may
not be collinear.
Symbols & Terms
Coplanar (co-planar) means on
the same plane.
–Points and/or lines may be
coplanar.
–Any three points are coplanar.
–More than three points may or may
not be coplanar.
Symbols & Terms
Description -
points that are
on the same
line
Drawing –
- Real world example
collinear
points
- Notation
Symbols & Terms
Description -
points that are
in the same
plane
Drawing –
- Real world example
coplanar
points
- Notation
Symbols & Terms
Description -
- Real world example
lines that are
in the same
plane
coplanar
Drawing –
lines
- Notation
Name three balls that are collinear.
Ball A is in the guy’s pocket. Ball C is on the girl’s racket.
All other balls are on the tennis court.
Name three balls that are
coplanar but not collinear.
Ball A is in the guy’s pocket. Ball C is on the girl’s racket.
All other balls are on the tennis court.
Name four balls that are not coplanar.
Ball A is in the guy’s pocket. Ball C is on the girl’s tennis racket.
All other balls are on the tennis court.
Symbols & Terms
Name each line in three
different ways.
E
m
P
A
R
T
Draw KL . Don’t forget
to use arrowheads to
show that it extends
indefinitely.
Symbols & Terms
Intersecting lines are lines that
meet.
– Lines intersect at a point.
Intersecting planes are planes that
meet.
– When planes intersect, a line is formed.
Symbols & Terms
Description -
- Real world example
lines that
meet
Drawing –
intersecting
lines
- Notation
Symbols & Terms
Description -
planes that
meet
Drawing –
intersecting
planes
- Real world example
- Notation