Intro to Points, Lines and Planes

Front

What is a line?

Back

A line is a straight one-dimensional figure that extends infinitely in both directions and has no thickness.

Front

What is a plane?

Back

A plane is a flat surface made up of points that has two dimensions and extends without end.

Front

What is a point?

Back

A point is a specific location in space that has no dimensions, represented by a dot.

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 a point and extends infinitely in one direction.

Front

What does collinear mean?

Back

Collinear refers to points that lie on the same line.

Front

What does coplanar mean?

Back

Coplanar refers to points that lie on the same plane.

Front

How many points are needed to define a line?

Back

At least 2 points are needed to define a line.

Front

What is the difference between parallel and perpendicular lines?

Back

Parallel lines never intersect and are always the same distance apart, while perpendicular lines intersect at a right angle (90 degrees).

Front

What is an angle?

Back

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