Basics of Geometry

Front

What is a line segment?

Back

A line segment is a part of a line that is bounded by two distinct endpoints.

Front

What is a line?

Back

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

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 it mean for points to be collinear?

Back

Points are collinear if they lie on the same straight line.

Front

What is an angle?

Back

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

Front

Identify the figure: A straight path with two endpoints.

Back

Line segment.

Front

Identify the figure: A straight path that extends infinitely in both directions.

Back

Line.

Front

Identify the figure: A straight path that starts at a point and extends infinitely in one direction.

Back

Ray.

Front

Are points A, B, and C collinear if they lie on the same line?

Back

Yes.

Front

Are points A, C, and D collinear if they do not lie on the same line?

Back

No.