Originally Posted by

**Dr._Tzun_Tzu**
Tangent is one line segment in any right angle. A Circle is used in trigonometry proofs to define the logic as to why you can generate unknown lengths if you have the other two sides, i.e. using sine/cosine, but the term Tangent also means, "Line at a right angle to....". In my case it was at a right angle to the floor.

The short bus crew on here believed that it meant "in the same direction" to the surface of a circle. Ironically that is most likely because they only used wiki. Even so a circle only exists as a representation of a radius spun 360 degrees, and a Tangent to a circle is still only a right angle to the radius. Circles don't exist, only radius do. It has nothing to do with the "surface" of the circle as that is infinite. "At a tangent" means at a right angle, and "the tangent" is the line that runs at a right angle to another line.

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