Classification of triangles
- 1 Triangles differentiated on the basis of their sides
- 2 Triangles differentiated on the basis of their angles.
- 3 Angles in a triangle
Triangles differentiated on the basis of their sides
A triangle with a pair of equal sides is called an isosceles triangle.
A triangle in which all the sides are of different lengths and no two sides are equal, the triangle is called a scalene triangle.
Triangles differentiated on the basis of their angles.
Acute angled triangle.
A triangle whose all angles are acute is called an acute-angled triangle or simply an acute triangle.
Right angle triangle
Right Isosceles Triangle
The Obtuse Triangle
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°.
* for geogebra link on types of triangles [click here ]
Angles in a triangle
Interior angles of a triangle
Exterior Angles of a triangle
Image Acknowledgement: Mathsisfun.com