nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW
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In [[Euclidean geometry]], each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º.
In [[Euclidean geometry]], each side of a triangle is perfectly straight, and the sum of the internal angles of a triangle is always 180º.
==Types of triangles==
A [[right triangle]] has one 90º angle. Right triangles have special properties (see [[trigonometry]]).
A [[right triangle]] has one 90º angle. Right triangles have special properties (see [[trigonometry]]).