Parallel Lines & Transversals Geo Ch 3 Half

Front

What are parallel lines?

Back

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

Front

What is a transversal?

Back

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

Front

Define corresponding angles.

Back

Angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What is the relationship between alternate interior angles?

Back

They are equal when two parallel lines are cut by a transversal.

Front

What is the sum of the interior angles of a triangle?

Back

180°.

Front

How do you calculate the sum of the interior angles of a polygon?

Back

(n - 2) × 180°, where n is the number of sides.

Front

What is the sum of the interior angles of a hexagon?

Back

720°.

Front

What type of angle pair are ∠1 and ∠5 if they are on the same side of the transversal and inside the two lines?

Back

Consecutive interior angles.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are equal.

Front

What is the sum of the interior angles of an octagon?

Back

1080°.