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AAA Theorem


Specifying three Angles $A$, $B$, and $C$ does not uniquely define a Triangle, but any two Triangles with the same Angles are Similar. Specifying two Angles of a Triangle automatically gives the third since the sum of Angles in a Triangle sums to 180° ($\pi$ Radians), i.e.,


See also AAS Theorem, ASA Theorem, ASS Theorem, SAS Theorem, SSS Theorem, Triangle

© 1996-9 Eric W. Weisstein