I hate this class... too many postulates!

### Parallel Postulate

If there is a line and point not on the line, then there is exactly 1 line through the point parallel to the given line

### Perpendicular Postulate

If there is a line and point not on the line then there is exactly 1 line through the point perpendicular to the given line

### Corresponding Angles Postulate

If 2 parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent

### Alt. Interior Angles Theorem

If 2 parallel lines are cut by a transversal, then the pairs of alternate interior angles are congruent

### Alt. Exterior Angles Theorem

If 2 parallel lines are cut by a transversal, then the pairs of alternate exterior angles are congruent

### Consecutive Interior Angles Theorem

If two parallel lines are cut by a transversal, then the pairs of consecutive interior angles are supplementary

### Corresponding Angles Converse

If two lines are cut by a transversal so the corresponding angles are congruent, then the lines are parallel

### Alt. Interior Angles Converse

If two lines are cut by a transversal so the alternate interrior angles are congruent, then the lines are parallel

### Alt. Exterior Angles Converse

If two lines are cut by a transversal so the alternate exterior angles are congruent, then the lines are parallel

### Consecutive Interior Angles Converse

If two lines are cut by a transversal so the consecutive interior angles are supplementary, then the lines are parallel

### Transitive Property of Parallel Lines

If two lines are parallel to the same line, then they are parallel to each other

### Perpendicular Transversal Theorem

If a transversal is ⊥ to one of 2 parallel lines, then it is ⊥ to the second line

### Lines ⊥ to a Transversal Theorem

In a plane, if 2 lines are ⊥ to the same line then the lines are parallel to one another