HONORS GEOMETRY CHAPTER 2 GRODEN

complemetary angles

two angles whose measures have a sum of 90

supplementary angles

Two angles whose measures have a sum of 180 degrees

Theorem

Vertical angles are congruent

Vertical Angles

Two angles such that the sides of one angles are opposite rays to the side of the other angle

Midpoint Theorem

If M is the midpoint of AB, then AM=1/2AB and MB=1/2AB

Angle Bisector Theorem

If BX is the bisector of

def of perpendicular lines

Two lines that intersect to form two right angles or 90 degrees

Perp fact 1

If two lines are perpendicular, then they form congruent adjacent angles

Perp fact 2

If two line form congruent adjacent angles then the lines are perpendicular

Perp fact 3

If the exterior sides of two adjacent acute angles are perpendicular then the angles are complementary.

Sup thrm

If two angles are supplements of congruent or the same angle then the angles are congruent

Comp thrm

If two angles are complements of congruent angles or the same angle, then the two angles are congruent