ASA Congruence

Pronunciation: /eɪ es eɪ kən'gruəns/ ?

In Euclidean geometry two triangles are known to be congruent if two corresponding angles and the side they contain are congruent.[1] Two angles and the side are congruent if they have the same measure. This is called ASA congruence. ASA stands for angle, side, angle.

In figure 1, angles A and A' are congruent, angles B and B' are congruent and line segment AB is congruent with line segment A'B'. Click and drag the blue points in the manipulative 1 to change it.

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Manipulative 1: Congruent triangles by ASA congruence. Created with GeoGebra

Cite this article as:


ASA Congruence. 2009-12-21. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/a/asacongruence.html.

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Revision History


2009-12-21: Added "References" (McAdams, David.)
2008-06-14: Changed manipulative from Geometer's Sketchpad to GeoGebra (McAdams, David.)
2008-06-07: Corrected link errors (McAdams, David.)
2007-09-24: Corrected angle 'V' to become angle 'B' (McAdams, David.)
2007-09-03: Initial version (McAdams, David.)

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