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We will learn the definition of a is: a tangent line touches a circle at one point and only at one point.

Previous video in this series on YouTube: https://youtu.be/G73wLV-Rf9E
Title search of video on other plateforms: Geometry - Ch. 6: Circles (17 of 39) Inscribed Triangle, Square, Pentaon, ...

Next video in this series on YouTube: https://youtu.be/OjIsgNPWbx4
Title search of video on other plateforms: Geometry - Ch. 6: Circles (19 of 39) Tangent Lines: Another Example