Download Geometry Vocabulary - Math with Miss McLean

Geometry
Vocabulary
Angle Pair Relationships
Supplementary Angles
•Two angles of have a sum of
180 degrees.
Complementary Angles
•Two angles have a sum of 90
degrees.
Vertical Angles
•Congruent angles that are
opposite of each other.
Perpendicular Lines
•Lines that intersect at right
angles.
Parallel Lines
•Two lines in a plane that
never intersect.
Transversal
•A line that intersects two or
more lines.
Corresponding Angles
•When two lines are crossed by a
transversal, the angles in
matching corners are congruent
and corresponding.
Alternate
•Angles that are on opposite
sides of the transversal.
Interior
•Refers to the angles in
between (or INSIDE) the two
parallel lines.
Exterior
•Refers to the angles OUTSIDE
of the two parallel lines.
Alternate Interior Angles
•When two parallel lines are
crossed by a transversal: the pairs
of congruent angles on OPPOSITE
sides of the transversal but INSIDE
the two lines are AIA.
Alternate Exterior Angles
•When two parallel lines are
crossed by a transversal: the pairs
of congruent angles on OPPOSITE
sides of the transversal but
OUTSIDE the two lines are AEA.
Same Side Interior Angles
•When two parallel lines are
crossed by a transversal: the
pairs of angles on the same side
of the transversal but INSIDE the
two lines are SSIA. SSIA have a
sum of 180 degrees.
Same Side Exterior Angles
•When two parallel lines are
crossed by a transversal: the
pairs of angles on the same side
of the transversal but OUTSIDE
the two lines are SSEA. SSEA
have a sum of 180 degrees.