Aline along anormal vector(i.e., perpendicular to sometangent line).

If is acentrosymmetric set which has a twice differentiable boundary, then there are normals through the center (Croftet al.1991, p. 15).

See also

Explore with Wolfram|Alpha

More things to try:

• Cayley lines
• lines
• y = ((e^x) + (e^-x))/2 find normal line at x=1

References

Referenced on Wolfram|Alpha

Cite this as:

Weisstein, Eric W. "Normal Line." FromMathWorld--A Wolfram Resource.https://mathworld.wolfram.com/NormalLine.html

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