What Is A Ray. Learn essential definitions of points, lines and planes. Recall that points are usually labelled with single upper-case (capital) letters.
One letter is written at the starting point of the ray and the other letter is written near the arrow end as AB and LM. In geometry, a ray can be defined as a part of a line that has a fixed starting point but no end point. So that's its starting point, but then it just keeps on going on forever.
Now, with that out of the way, let's actually try to do the Khan Academy module on recognizing the difference between line.
Ray tracing is actually nothing new.
Ray accomplishes this mission by Ray Core provides the simple primitives for application building. Mammography is a type of X-ray. Rays and skates are dorsoventrally flattened fish that are closely related to sharks.