Theorems

Front

All vertical angles are congruent.

Back

Vertical Angles Congruence Theorem

Front

The sum of the measures of a linear pair is 180 degrees

Back

Linear Pair Theorem

Front

If two angles are supplementary to the same or congruent angles, then the angles are congruent to each other.

Back

Congruent Supplements Theorem

Front

If two angles are complementary to the same angle or congruent angles, then those angles are congruent to each other.

Back

Congruent Complements Theorem

Front

All right angles are congruent

Back

Right Angle Congruence Theorem

Front

(Unnamed Theorem: Fill in the blank)
If two angles are supplementary and congruent, then they are:______

Back

Right Angles

Front

If a transversal intersects 2 parallel lines, then the same side interior angles are supplementary.

Back

Same-side Interior Angles POSTULATE

Front

If two lines are parallel, then corresponding angles are congruent.

Back

Corresponding Angles Theorem

Front

If two lines are parallel, then alternate interior angles are congruent.

Back

Alternate Interior Angles Theorem

Front

If two lines are parallel, then alternate exterior angles are congruent

Back

Alternate Exterior Angle Theorem