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If two angles are supplementary to the same angle, then they are supplementary to each other.
Passing through a point not on line l, there exists exactly one line perpendicular to line l.
If line 1 is in plane X and line 2 is in plane Y and X is parallel to Y, then line 1 is parallel to line 2.
If points M and N are on line PQ and line PM is congruent to line NQ, then line PN is congruent to line MQ
A point that is equidistant from the endpoints of a segment _________ lies on a perpendicular bisector of that segment
The measure of an exterior angle of a triangle is ________ equal to the sum of the measures of two interior angles
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