### 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.
Example:

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.
Example:

In here, the two of the sides are equal in measure $$AB$$ $$= CA$$ $$= 1$$ unit and $$BC = √2$$ units.