Angle Proofs

Front

What is the Substitution Property?

Back

If two quantities are equal, one can be substituted for the other in any expression.

Front

What is the Symmetric Property?

Back

If a = b, then b = a.

Front

What is the Transitive Property?

Back

If a = b and b = c, then a = c.

Front

What is the Reflexive Property?

Back

Any quantity is equal to itself; a = a.

Front

What is the Definition of a Linear Pair?

Back

Two adjacent angles that form a straight line and are supplementary.

Front

What are Supplementary Angles?

Back

Two angles whose measures add up to 180 degrees.

Front

What is the Angle Addition Postulate?

Back

If point B is in the interior of angle AOC, then the measure of angle AOB + the measure of angle BOC = the measure of angle AOC.

Front

What is the Definition of Midpoint?

Back

A point that divides a segment into two equal parts.

Front

What is the Definition of Bisect?

Back

To divide something into two equal parts.

Front

What is the Vertical Angle Theorem?

Back

Vertical angles are equal; if two angles are opposite each other when two lines intersect, they are equal.