Geometry Vocabulary 4th Grade

What is a line?

• A path with two endpoints

• A straight path that goes on forever in two directions

• A path that begins at a point and goes forever in one direction

• A specific location in space.

What is a line segment?

• A) A straight path that goes on forever in two directions

• B) Part of a line with two endpoints

• C) A path that begins at a point and goes forever in one direction

• D) Lines that cross over each other.

What is a ray?

• A straight path that goes on forever in two directions

• Part of a line with two endpoints

• A straight path that begins at a point and goes on forever in one direction

• Lines that do not ever cross.

What is a point?

• A straight path that goes on forever in two directions

• A specific location in space or on a line/line segment

• A path that begins at a point and goes forever in one direction

• Lines that cross over each other.

What are intersecting lines?

• Lines that do not ever cross

• Lines that cross over each other

• Lines that form right angles

• A straight path that goes on forever in two directions.

What are parallel lines?

• Lines that cross over each other

• Lines that do not ever cross

• Lines that form right angles

• A path that begins at a point and goes forever in one direction.

What are perpendicular lines?

• Lines that cross and form right angles (90 degrees)

• Lines that do not ever cross

• Lines that cross over each other

• A straight path that goes on forever in two directions.

What is an angle?

• Two rays that meet at the same point

• A straight path that goes on forever in two directions

• Part of a line with two endpoints

• A path that begins at a point and goes forever in one direction.

What is an acute angle?

• An angle that measures less than 90 degrees

• An angle that measures more than 90 degrees

• An angle that measures exactly 90 degrees

• An angle that measures exactly 180 degrees.

What is an obtuse angle?

• An angle that measures less than 90 degrees

• An angle that measures more than 90 degrees

• An angle that measures exactly 90 degrees

• An angle that measures exactly 180 degrees.