Lines and Angles Vocabulary

What is a right angle?

• An angle that measures exactly 90 degrees.

• An angle that measures exactly 45 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures more than 180 degrees.

What is a transversal?

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

• A type of angle formed by two intersecting lines.

• A line that runs parallel to another line.

• A line that connects the midpoints of two sides of a triangle.

What is a line?

• A line is a straight path that extends infinitely in both directions and has no endpoints.

• A line is a curved path that connects two points.

• A line is a segment that has a fixed length.

• A line is a collection of points that form a closed shape.

What is a straight angle?

• An angle that measures exactly 90 degrees.

• An angle that measures exactly 180 degrees.

• An angle that measures less than 90 degrees.

• An angle that measures more than 180 degrees.

What is a line segment?

• A line that extends infinitely in both directions.

• A part of a line that has two endpoints.

• A line that curves and does not have endpoints.

• A line that is only vertical.

What is an angle?

• An angle is formed by two rays that share a common endpoint, called the vertex.

• An angle is a straight line that measures 180 degrees.

• An angle is a figure formed by three points in a plane.

• An angle is a type of polygon with four sides.

What is a ray?

• A ray is a part of a line that starts at one endpoint and extends infinitely in one direction.

• A ray is a line that has two endpoints and does not extend infinitely.

• A ray is a part of a circle that connects two points on the circumference.

• A ray is a straight line that extends infinitely in both directions.

What are intersecting lines?

• Lines that run parallel to each other.

• Lines that cross each other at one point.

• Lines that never meet or cross.

• Lines that are perpendicular to each other.

What is an acute angle?

• An angle that measures less than 90 degrees.

• An angle that measures exactly 90 degrees.

• An angle that measures more than 90 degrees but less than 180 degrees.

• An angle that measures exactly 180 degrees.

What are complementary angles?

• Two angles whose measures add up to 90 degrees.

• Two angles that are equal in measure.

• Two angles that add up to 180 degrees.

• Two angles that are adjacent to each other.