What is a Ray and how do we label one

The video tutorial covers foundational geometry concepts, focusing on lines and rays. It begins with a recap of the previous class on angles and lines, explaining how lines extend indefinitely in both directions. The tutorial then introduces rays, which are parts of lines that extend indefinitely in one direction, emphasizing the importance of writing rays starting with the endpoint. The tutorial provides clear distinctions between lines and rays, aiding in understanding their properties and representations.

What is a key characteristic of a line in geometry?

• It extends indefinitely in both directions.

• It has a starting point and an endpoint.

• It extends indefinitely in one direction.

• It forms a closed loop.

How does a ray differ from a line?

• A ray extends indefinitely in both directions.

• A ray has two endpoints.

• A ray extends indefinitely in one direction from an endpoint.

• A ray forms a closed loop.

When naming a ray, which point should you start with?

• The point where the ray ends.

• Any point on the ray.

• The endpoint of the ray.

• The midpoint of the ray.

What symbol is used to represent a ray in geometry?

• A line with arrows on both ends.

• A line with an arrow on one end.

• A circle with a dot in the center.

• A triangle with a base.

Why is it incorrect to write a ray from B to A if A is the endpoint?

• Because rays cannot be named in reverse.

• Because the ray does not extend towards A.

• Because B is not a valid point.

• Because A is the endpoint and the ray extends from A.