Lesson 18B Proof Properties, Algebra and Segment Proofs

Front

What is the Multiplication Postulate?

Back

If PQ = 7, then 3(PQ) = 3(7) = 21.

Front

What does the Reflexive Postulate state?

Back

Front

What is the Definition of Midpoint?

Back

The midpoint of a segment is the point that divides the segment into two equal parts.

Front

What is the Transitive Property?

Back

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

Front

What is the Symmetric Property?

Back

If a = b, then b = a.

Front

What is the Segment Addition Postulate?

Back

If point B is between points A and C, then AB + BC = AC.

Front

What is the Addition Property of Equality?

Back

If a = b, then a + c = b + c for any c.

Front

What is the Substitution Property?

Back

If a = b, then b can be substituted for a in any expression.

Front

What is the definition of congruent segments?

Back

Segments that have the same length are called congruent segments.

Front

What is the definition of congruent angles?

Back

Angles that have the same measure are called congruent angles.