Naming Segments, Lines, Rays and Angles

Front

What is a line segment?

Back

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

Front

What is a ray?

Back

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

Front

What is a line?

Back

A line is a straight path that extends infinitely in both directions with no endpoints.

Front

What is an angle?

Back

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

Front

How do you denote a line segment?

Back

Front

How do you denote a ray?

Back

A ray is denoted by its endpoint and another point, e.g., @@ ightarrow{AB}@@.

Front

How do you denote a line?

Back

A line is denoted by two points on the line with a double-headed arrow over them, e.g., @@ ightarrow{AB}@@.

Front

What is the vertex of an angle?

Back

The vertex of an angle is the point where the two rays meet.

Front

What is the difference between acute, right, and obtuse angles?

Back

An acute angle is less than 90 degrees, a right angle is exactly 90 degrees, and an obtuse angle is greater than 90 degrees but less than 180 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.