Theory:

Let's learn the special types of triangles:
Triangles can be classified based on its sides as well as its angles.
Special types of triangles are as follows:
    • Equilateral triangle
    • Isosceles triangle
 A triangle is an equilateral when all its sides are equal in length.
Theory3.1.png
Example:
Theory3.2.png
 
In here, the sides are equal in measure \(AB\) \(= BC\) \(= CA\) \(= 5\) units.
A triangle is isosceles when two of its sides and angles are equal in measure.
Theory3.3.png
Example:
Theory3.4.png
 
In here, the two of the sides are equal in measure \(AB\) \(= CA\) \(= 1\) unit and \(BC = √2\) units.