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Vertical angles
angles that are opposite from each other and are formed when 2 lines intersect. Congruent angles.
Adjacent angles
angles that share a vertex and a side, but do not overlap
Complementary angles
are angles that add up to 90 degrees
Straight angles
is an angle that measures 180 degrees and forms a straight line
Obtuse angles
an angle that is greater than 90 degrees but less than 180 degrees
Supplementary angles
angles that add up to 180 degrees
Acute angles
an angle that is less than 90 degrees
Right angle
measures exactly 90 degrees and is known as a "corner" angle
Parallel lines
lines that never intersect
Perpendicular lines
lines that intersect to form a right angle
Congruent angles
angles that have the same measure
Transversal line
a line that intersects two parallel lines
Alternate interior angles
on opposite sides of the transversal and inside the parallel lines
Alternate exterior angles
on opposite sides of the transversal and outside the parallel lines
Same side interior angles
two interior angles on the same side of the transversal
Same side exterior angles
two exterior angles on the same side of the transversal
Corresponding angles
in the same relative position
Remote exterior angles
equal to the sum of its two remote interior angles
Consecutive angles
interior angles that lie on the same side of the transversal
Triangle Angle Sum Theorem
The sum of the measures of the angles of a triangle is 180.
Note 
Flashcard (54)