# Theorems

## 11 terms

### Midpoint Theorem

If M is the midpoint of AB, then AM + MB = AB

### Supplement Theorem

If two angles form a linear pair, then they are supplementary angles

### Complement Theorem

if the noncommon sides of two adjacent angles form a right angle, then the angles are complementary angles

### Congruent Supplements Theorem

if two angles are supplementary to the same angle (or to congruent angles) then they are congruent

### Congruent Complements Theorem

if two angles are complementary to the same angle (or to congruent angles) then the two angles are congruent

### Vertical Angles Theorem

If two angles are vertical, then they are congruent

### Right Angle Theorem

All right angles are congruent

### Right Angle Theorem (Perpendiculars)

Perpendicular lines intersect to create four right angles.

### Right Angle Theorem (Supplements)

If two angles are congruent and supplementary, then each angle is a right angle.

### Right Angle Theorem (Lin. Pairs)

If two angles form a linear pair and are congruent, then they are right angles.

### Right Angle Theorem (Perp. Lines)

Perpendicular lines form congruent adjacent angles.