2 ms·
I have no idea what these guys are talking about, but this is a tangent: http://en.wikipedia.org/wiki/File:Tangent_to_a_curve.svg http://en.wikipedia.org/wiki/
by DougBTX 17y ago
I have no idea what these guys are talking about, but this is a tangent:
http://en.wikipedia.org/wiki/File:Tangent_to_a_curve.svg http://en.wikipedia.org/wiki/File:Tangent_to_a_curve.svg
And AB is orthogonal to CD:
http://en.wikipedia.org/wiki/File:Perpendicular-coloured.svg http://en.wikipedia.org/wiki/File:Perpendicular-coloured.svg