Parallel Lines and Angles Flashcards

Lines that are always the same distance apart and never meet, no matter how far they are extended.

A line that crosses two or more other lines.

Angles in matching positions on parallel lines cut by a transversal. They are equal.

Angles on opposite sides of the transversal but inside the parallel lines. They are equal.

Angles on the same side of the transversal and inside the parallel lines. They add up to 180°.

Angles opposite each other when two lines cross. They are always equal.

Two angles that add up to 180°.

The sum of the angles in a triangle is always 180°.

The sum of the angles in a quadrilateral is always 360°.

The Z-shape formed by alternate angles when a transversal cuts parallel lines. These angles are equal.