1.1 Points, Lines, and Planes

Front

What is a point in geometry?

Back

A point is a specific location in space that has no dimensions (length, width, or height). It is usually represented by a dot and labeled with a capital letter.

Front

Define a line in geometry.

Back

A line is a straight one-dimensional figure that extends infinitely in both directions. It has no endpoints and is usually represented by two points on the line with a line symbol above them.

Front

What is a plane in geometry?

Back

A plane is a flat two-dimensional surface that extends infinitely in all directions. It is defined by three non-collinear points.

Front

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

Back

A line segment has two endpoints and a definite length, while a line extends infinitely in both directions and has no endpoints.

Front

How do you name a line?

Back

A line can be named using any two points on the line, or by a lowercase letter.

Front

What is a collinear point?

Back

Collinear points are points that lie on the same straight line.

Front

What does it mean for points to be coplanar?

Back

Coplanar points are points that lie on the same plane.

Front

How can you represent a line in a diagram?

Back

A line can be represented in a diagram using a straight line with arrows on both ends, indicating it extends infinitely.

Front

What is the notation for a line segment between points A and B?

Back

Front

What is the notation for a ray starting at point A and passing through point B?

Back

The notation for a ray starting at point A and passing through point B is written as @@ ightarrow{AB} @@.