Download Congruency Vocabulary

Congruency Vocabulary
See how much you already know…
1. Match the word, definition and
example/symbol for each vocabulary
term .
2. As the class reviews each definition,
make corrections and glue in place.
Plane
Definition
a perfectly flat
surface that
extends
forever in all
directions
Example
Parallel Lines
Definition
lines in a plane that
never meet; they stay
the same distance
apart, like railroad
tracks
Example
Symbol
Coincidental Lines
Definition
The same
line; existing
at the same
time and
place.
Example
Skew Lines
Definition
Straight lines
that are not in
the same
plane and do
not intersect.
Example
Non-Example
Perpendicular Lines
Definition
lines that
intersect at
a 90˚ angle
Example
Symbol

Transversal
Definition
A line that intersects
two or more lines
that lie in the same
plane. Transversals
to parallel lines
create angles with
special properties.
Example
Right Angle
Definition
angle that
measures 90˚
Example
Symbol
Acute Angle
Definition
greater than
0˚ and less
than 90˚
Example

Obtuse Angle
Definition
greater than
90˚ and less
than 180˚
Example

Complementary Angles
Definition
two angles that
combine to make
90˚
Example
Supplementary Angles
Definition
two angles that
combine to make
180˚
Example
Congruent
Definition
describes
figures that
have the same
size and shape;
angles that
have the same
measure are
congruent
Example
45
45
Symbol

Vertical Angles
Definition
intersecting lines
form two pairs of
vertical (opposite)
angles; vertical
angles are always
congruent to each
other
Example
Corresponding Angles
Definition
angles formed by
a transversal
across parallel
lines; these
angles are
congruent and
have the same
position relative to
their parallel line
and the
transversal
Example
Alternate Exterior Angles
Definition
angles formed by a
transversal across
parallel lines; these
angles are
congruent and are
on opposite sides of
the transversal and
are exterior to the
parallel lines
Example
Alternate Interior Angles
Definition
angles formed by a
transversal across
parallel lines; these
angles are congruent
and are on opposite
sides of the
transversal and are
interior to the parallel
lines
Example
Consecutive Interior Angles
• angles formed by a
transversal across
parallel lines; these
angles are
supplementary and
are on the same
side of the
transversal and are
interior to the
parallel lines
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