Pons Asinorum

An elementary theorem in geometry whose name means "asses' bridge," perhaps in reference to the fact that fools would be unable to pass this point in their geometric studies. The theorem states that the angles at the base of an isosceles triangle (defined as a triangle with two legs of equal length) are equal and appears as the fifth proposition in Book I of Euclid's Elements.

See also

Ass and Mule Problem, ASS Theorem, Isosceles Triangle, Pythagorean Theorem

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Dunham, W. Journey through Genius: The Great Theorems of Mathematics. New York: Wiley, p. 38, 1990.Wells, D. The Penguin Dictionary of Curious and Interesting Geometry. London: Penguin, pp. 193-194, 1991.

Referenced on Wolfram|Alpha

Pons Asinorum

Cite this as:

Weisstein, Eric W. "Pons Asinorum." From MathWorld--A Wolfram Web Resource.

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