

Types of TrianglesIsosceles, Equilateral, Scalene, Obtuse. . .
Triangles can be classified by various properties relating to their angles and sides. The most common classifications are described on this page.
This Page: Practice Identifying Triangle Types Related Page: Online Triangle Calculator  Triangle and its properties Classifications of Triangles The Equilateral triangle shown on the left has three equal sides and three equal angles. Each angle is 60°
The Obtuse Triangle has an obtuse angle (an obtuse angle has more than 90°). In the picture on the left, the shaded angle is the obtuse angle that distinguishes this triangle
Since the total degrees in any triangle is 180°, an obtuse triangle can only have one angle that measures more than 90°.
Practice Problems
