An elementary theorem in geometry whose name means ``asses' bridge.'' 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.

**References**

Dunham, W. *Journey Through Genius: The Great Theorems of Mathematics.* New York: Wiley, p. 38, 1990.

© 1996-9

1999-05-26