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What is a Ray?

What is a ray?

Summary

  1. A ray starts at a point and extends forever in one direction without ending
  2. The arrowhead on the line means that it should go on forever in that direction
  3. The point where the ray starts is called the 'endpoint'
  4. The point 'S' is an endpoint
  5. The name of a ray should always start with the endpoint, and have a little arrow above the name pointing to the right
  6. TS is not a name for our ray because T is not the endpoint
  7. The arrow above the name of the ray should always point to the right
  8. 'P' is an endpoint
  9. 'G' is an endpoint
  10. The ray is labeled GI because G is the endpoint and because I is a point on the ray

Notes

    1. The point that the ray starts at is called the 'endpoint'
    1. There are a few more rules to naming rays than naming lines or line segments!
    1. The endpoint is where the ray begins
    2. The point 'S' is an endpoint
    3. The point 'T' is also on the ray, closer to the arrowhead
    4. The arrow above the two points must always point to the right
    1. The name of a ray must start with the endpoint but just has to include another point on the ray
    2. You would usually see this ray called GI, but calling it GH wouldn't be wrong