Points, Lines, & Angles Vocabulary

Front

What are lines in a plane that cross at exactly one point?

Back

Intersecting lines are lines in a plane that cross at exactly one point, forming four angles.

Front

What are lines in a plane that are always the same distance apart and never intersect?

Back

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

Front

What type of angle measures more than 90 degrees but less than 180 degrees?

Back

An obtuse angle measures more than 90 degrees but less than 180 degrees.

Front

What is a straight path of points that continues without end in both directions?

Back

A line is a straight path of points that continues without end in both directions.

Front

What type of angle measures exactly 90 degrees?

Back

A right angle measures exactly 90 degrees.

Front

What is a part of a line that has a fixed starting point and extends infinitely in one direction?

Back

A ray is a part of a line that has a fixed starting point and extends infinitely in one direction.

Front

What do you call two lines that intersect to form right angles?

Back

Perpendicular lines are two lines that intersect to form right angles.

Front

What is the term for the space between two intersecting lines?

Back

The angles formed by intersecting lines are the spaces between the lines.

Front

What is a line segment?

Back

A line segment is a part of a line that has two endpoints.

Front

What is the term for an angle that measures less than 90 degrees?

Back

An acute angle measures less than 90 degrees.