Congruent Angles
Two angles are congruent if they have the same measure
Congruent Segments
Two segments are congruent if they have the same length
Midpoint
The point that divides a segment into two congruent segments
Segment Bisector
A segment, ray, line, or plane that intersects a segment at its midpoint
Perpendicular Lines
Two lines are perpendicular if they intersect to form a right angle
Angle Bisector
A ray that divides the angle into 2 congruent angles
Perpendicular line and plane
A line is perpendicular to a plane if it is perpendicular to each line in the plane that intersects it