Divides a segment or angle into two equal parts
Bisector
Figures that have the same size, shape, and angle measure
congruent
Lines that intersect and form right angles
perpendicular
Divides a segment into 2 congruent segments
midpoint
Two angles whose sum is 180 degrees
Supplementary
Opposite and congruent angles formed by intersecting lines
Vertical
Sharing a common side or angles between to figures
reflexive property
two angles whose sum is 90 degrees
complementary
An angle that measures exactly 90 degrees
Right
Perpendicular line to the base, forming right angles
Altitude
Two angles in a triangle are congruent
Isosceles
Two angles that share a common vertex and a side
Adjacent angles