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△is used to algebraically denote a triangle. Next to this symbol, the three vertices of the triangle are written in any order. For example, △ABC and △BCA both denote the triangle whose vertices are A, B, and C.
Classification of Triangles | |
---|---|
By Angle Measures | By Side Lengths |
Acute Triangle | Scalene Triangle |
Right Triangle | Isosceles Triangle |
Obtuse Triangle | Equilateral Triangle |
Equiangular Triangle |