Geometry - 2 Column Proofs

Front

What is the Transitive Property?

Back

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

Front

What is the Reflexive Property?

Back

For any number a, a = a.

Front

What is the definition of congruence?

Back

Two figures are congruent if they have the same shape and size.

Front

What is the first statement in the reason column of a proof?

Back

Given.

Front

What is the definition of an angle?

Back

An angle is formed by two rays with a common endpoint.

Front

What is the sum of the angles in a triangle?

Back

180 degrees.

Front

What is a vertical angle?

Back

Vertical angles are the angles opposite each other when two lines intersect.

Front

What is the definition of complementary angles?

Back

Two angles are complementary if the sum of their measures is 90 degrees.

Front

What is the definition of supplementary angles?

Back

Two angles are supplementary if the sum of their measures is 180 degrees.

Front

What is the definition of a right angle?

Back

A right angle measures 90 degrees.