Basic Geometry Definitions

Front

What is a line?

Back

A line is a straight path made up of an infinite number of points. It has arrows on each end because it continues forever.

Front

What is a line segment?

Back

A line segment consists of 2 endpoints and all the points in between.

Front

What are perpendicular lines?

Back

Perpendicular lines are two coplanar lines that meet to form four right angles.

Front

What is a ray?

Back

A ray is a collection of points that extends in one direction from a starting point.

Front

What is a plane?

Back

A plane is a flat surface that extends infinitely in all directions.

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 are parallel lines?

Back

Parallel lines are lines in the same plane that never meet and are always the same distance apart.

Front

What is an angle?

Back

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

Front

What is a point?

Back

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

Front

What is the relationship between intersecting lines and angles?

Back

Intersecting lines meet at a point and form angles, which can be acute, right, or obtuse.