Vacabulary #1
angles that have a common side
Common side
Two lines are parallel if and only if _______________ congruent
- Alternate interior or exterior angles
- Corresponding angles
Angles that make a straight line
Linear pair
Two lines are parallel if and only if _______________ supplementary
- Same side interior or exterior angles
If two two or angles sum up to 180 degrees then are ___________________
Supplementary
Angles that add up to 90 degree
Complementary
Angles formed by two intersecting lines
Vertical angles