Lines, Points, Rays, Line Segments

Front

What is a point in geometry?

Back

A point is a specific location in space that has no size or dimension.

Front

What is a line in geometry?

Back

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

Front

What is a ray in geometry?

Back

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

Front

What is a line segment?

Back

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

Front

How is a ray represented in geometry?

Back

A ray is represented with an endpoint and an arrow indicating its direction, e.g., @@ ightarrow{AB}@@.

Front

How is a line segment represented in geometry?

Back

Front

What is the difference between a line and a line segment?

Back

A line extends infinitely in both directions, while a line segment has two endpoints.

Front

What is the symbol for a line?

Back

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

Front

What does it mean for two lines to be perpendicular?

Back

Two lines are perpendicular if they intersect at a right angle (90 degrees).

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.