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Alternate interior angles
two angles that are formed by two lines and a transversal amd lie between the two lines and on opposite sides of the transversal

Alternate Exterior Angles
two angles that are formed by two lines and a transversal and lie outside the two lines and on opposite sides of the transversal

adjacent angles
two angles that share a common vertex and side, but have no common interior points

biconditional statement
a statement that contains the phrase 'if and only if'

collinear points
points that lie on the same line

Complemantary angles
two angles whos measures have the sum of 90 degrees. the sum of the measures of an angle its complement is 90

congruent angles
angles that have the same measure

coplanar points
points that lie in the same plane

distance from a point to a line
the length of the perpendicular segement from a point to the line

interior angles
when the sides of a traingle are extended, the three original original angles of a triangle

exterior angles
when the sides of a triangle are extended, the angles that are adjacent to the interior angles

