Cumulative #3: Parallel & Perp. Lines; Congruent Triangles

Front

What are parallel lines?

Back

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

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees).

Front

Define congruent triangles.

Back

Triangles that have the same size and shape, meaning their corresponding sides and angles are equal.

Front

What is the SSS postulate?

Back

If three sides of one triangle are equal to three sides of another triangle, then the triangles are congruent.

Front

What is the ASA postulate?

Back

If two angles and the included side of one triangle are equal to two angles and the included side of another triangle, then the triangles are congruent.

Front

What is the AAS postulate?

Back

If two angles and a non-included side of one triangle are equal to two angles and a non-included side of another triangle, then the triangles are congruent.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines.

Front

What are same side (consecutive) interior angles?

Back

Angles that are on the same side of the transversal and inside the two lines.

Front

What is the relationship between supplementary angles?

Back

Two angles that add up to 180 degrees.