Angle & Segment Proofs

Front

What is the definition of congruent angles?

Back

Congruent angles are angles that have the same measure.

Front

What does the Transitive Property state?

Back

If angle A is congruent to angle B, and angle B is congruent to angle C, then angle A is congruent to angle C.

Front

What is the Addition Property of Equality?

Back

If two quantities are equal, adding the same amount to both sides keeps them equal.

Front

What is the Subtraction Property of Equality?

Back

If two quantities are equal, subtracting the same amount from both sides keeps them equal.

Front

What is the Definition of Midpoint?

Back

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

Front

What is the Definition of Perpendicular Lines?

Back

Perpendicular lines are lines that intersect to form right angles.

Front

What is the Definition of Parallel Lines?

Back

Parallel lines are lines in a plane that never meet and are always the same distance apart.

Front

What is the Complementary Angles Theorem?

Back

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

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.

Front

What is the definition of a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.