Lines, Line Segments, Rays

Front

What is a line?

Back

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

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 does it mean for points to be coplanar?

Back

Points are coplanar if they all lie on the same plane.

Front

What is a noncoplanar point?

Back

A noncoplanar point is a point that does not lie on the same plane as other points.

Front

How do you denote a line segment in geometric notation?

Back

Front

How do you denote a ray in geometric notation?

Back

A ray is denoted by placing an arrow over the starting point and another point, e.g., @@ ightarrow{AB}@@.

Front

What is the difference between parallel lines and intersecting lines?

Back

Parallel lines never meet, while intersecting lines cross each other at one point.

Front

What is the symbol for a line?

Back

A line is often represented with a double-headed arrow over two points, e.g., @@ ightarrow{AB}@@.

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in the same plane that do not intersect.