math test 1.2-1.5

adjacent angles : two coplanar a angles with common side , common vertex, and no common interior interior points

vertical angles : two angles whose sides are opposite rays

opposite rays : two collinear ray with the same endpoint. they always form a lie

skew lines : lines that do not lie in the same plane and do not intersect

if line EG lies in plane X, point G lies in plane X : always

if three points are coplaner they are collinear : somtines

parallel planes : planes that do not intersect

space : is the set of all points

congruent angles : angles with the same measure

linear pair : pair of adjacent angles whose noncommon sides are opposite rays

... : AB and BA are ------- the same ray

... : four points are coplanar