Angles & Lines Vocab

Front

What is a perpendicular bisector?

Back

A line that divides another line segment into two equal parts at a 90-degree angle.

Front

What is a midpoint?

Back

The point that divides a line segment into two equal parts.

Front

What are corresponding angles?

Back

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

Front

What is an angle bisector?

Back

A ray that divides an angle into two equal angles.

Front

What are vertical angles?

Back

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

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are angles that form a line?

Back

Two angles that are adjacent and their sum is 180 degrees.

Front

What is a segment bisector?

Back

A line, ray, or segment that divides another segment into two equal parts.

Front

What is the relationship between parallel lines and corresponding angles?

Back

When a transversal crosses parallel lines, corresponding angles are equal.

Front

What is the definition of an angle?

Back

A figure formed by two rays with a common endpoint called the vertex.