Geometry 2M: 2 Column Proofs

Front

What is the Reflexive Property of Equality?

Back

For any quantity a, it is true that a = a.

Front

What is the Substitution Property of Equality?

Back

If a = b, then a can be replaced by b in any expression.

Front

What is the Addition Property of Equality?

Back

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

Front

What is the Subtraction Property of Equality?

Back

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

Front

What is the Transitive Property of Equality?

Back

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

Front

What is the Addition Property of Inequality?

Back

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

Front

What is the Subtraction Property of Inequality?

Back

If a < b, then a - c < b - c for any c.

Front

What is the definition of congruent angles?

Back

Two angles are congruent if they have the same measure.

Front

What is the definition of congruent segments?

Back

Two segments are congruent if they have the same length.

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect; they are always congruent.