Do you mean a perpendicular ray?
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what is a perpidicular ray?
2 answers
Here is what perpendicular means:
Look at the capital letter T
The line portion of the T downward is perpendicular to the top line across.
Walls of a room are perpendicular to the floor.
Look at the capital letter T
The line portion of the T downward is perpendicular to the top line across.
Walls of a room are perpendicular to the floor.