Category:Tangents to Circles

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This category contains results about Tangents to Circles.
Definitions specific to this category can be found in Definitions/Tangents to Circles.

In the words of Euclid:

A straight line is said to touch a circle which, meeting the circle and being produced, does not cut the circle.

(The Elements: Book $\text{III}$: Definition $2$)


TangentCircle.png

In the above diagram, the line is tangent to the circle at the point $C$.