Geometric Proofs Reasons Matching.

Front

What are parallel lines?

Back

Parallel lines are two lines that never intersect.

Front

What does the Vertical Angle Theorem state?

Back

If angles are vertical, then they are congruent.

Front

What does the Linear Pair Theorem state?

Back

If two angles form a linear pair, then they are supplementary.

Front

What defines adjacent angles?

Back

Adjacent angles share one vertex and one ray.

Front

What are supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

What are complementary angles?

Back

Complementary angles are two angles whose measures add up to 90 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 plus the measure of angle BOC equals the measure of angle AOC.

Front

What is a linear pair?

Back

A linear pair is a pair of adjacent angles formed when two lines intersect.

Front

What are vertical angles?

Back

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

Front

What is the definition of a transversal?

Back

A transversal is a line that intersects two or more lines at different points.