Adjacent angles
Side by side angles share a common point and one common side
Congurent angle
Angles with the same measurement
Vertical angles
Across from each other by two intersecting lines are always congruent
Acute
Greater than 0 and less than 90
Right angles
Is always 90
Obtuse
Is greater than 90 and less than 180
Straight angle
Is 180
Complementary
Are two angles who measures add up to 90
Supplementary angles
Are two angles who measures add up to 180
3 congurent angle properties
Alternate interior angle
Alternate exterior angle
Corresponding angles
Parallel
Lines that never touch
Perpendicular
Lines that intersect at 90
Transversal
A line that intersects two or more lines