Geometry Vocabulary 1

Front

What is an undefined term in geometry?

Back

An undefined term is a basic concept that is not formally defined but is understood through its common usage. Examples include point, line, and plane.

Front

What is a point in geometry?

Back

A point is a location in space that has no size or dimension. It is often represented by a dot.

Front

What is a line in geometry?

Back

A line is a straight one-dimensional figure that extends infinitely in both directions with 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 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 the definition of slope?

Back

Slope is a number that measures the steepness of a line, calculated as the ratio of the rise (vertical change) to the run (horizontal change).

Front

What are perpendicular lines?

Back

Perpendicular lines are two lines that intersect to form a 90-degree angle.

Front

What are parallel lines?

Back

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

Front

What is an angle in geometry?

Back

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

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices.