nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW
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If a triangle is not one of the above, it is a [[Scalene Triangle|scalene triangle]].
If a triangle is not one of the above, it is a [[Scalene Triangle|scalene triangle]].
An [[obtuse triangle]] has one angle that measures more than 90<sup>o</sup>.
==Congruence of triangles==
==Congruence of triangles==
'''Angle-Angle-Side (AAS)''': If two angles and a side that is not included are equal to the ones of another triangle, then the triangles are congruent.<br>
'''Angle-Angle-Side (AAS)''': If two angles and a side that is not included are equal to the ones of another triangle, then the triangles are congruent.<br>
The SSA (Side-Side-Angle) cannot prove triangles congruent unless it is a right angle, where it is known as the HL (Hypotenuse-Leg) Theorem. AAA (Angle-Angle-Angle) cannot prove triangles congruent either. In [[hyperbolic geometry]], however, it does prove congruence.
The SSA (Side-Side-Angle) cannot prove triangles congruent unless it is a right angle, where it is known as the HL (Hypotenuse-Leg) Theorem. AAA (Angle-Angle-Angle) cannot prove triangles congruent either. In [[hyperbolic geometry]], however, it does prove congruence.
==See also==
==See also==
*[[polygon]]
*[[polygon]]
[[Category:Geometry]]
[[Category:Geometry]]