|Classification of Triangles|
|By Side||By Angle|
|Scalene triangle||Acute triangle|
|Isosceles triangle||Right triangle|
|Equilateral triangle||Obtuse triangle|
A scalene triangle is a triangle in which all three sides have different lengths.
A right triangle is a specific type of triangle that contains a right angle. The side that lies opposite the right angle is always the longest and is known as the hypotenuse. The other sides are commonly called legs.