How can an isosceles triangle be identified?

Hint: In this question we need to explain the theory behind the identification of an isosceles triangle. From the basics of concept we know that any triangle having two sides or angles are equal is known as isosceles triangle.

Complete step by step solution:
Now considering from the question we have been asked to explain the theory behind the identification of an isosceles triangle.
From the basics of concept we know that any triangle having two sides or angles are equal is known as isosceles triangle.
If we observe the below figure we have six different elements related to each other in the triangle.
We generally have three types of triangles classified on the basics of sides.
1) If all sides are different then it is known as a scalene triangle.
2) If any two sides are equal then it is known as an isosceles triangle.
3) If all sides are equal then it is known as an equilateral triangle.

Therefore we can conclude that we can identify an isosceles triangle by observing its side’s length.

Note: While answering this type of question we should be sure with our concepts that we apply. This is a very simple theory based question. Similarly we can identify a scalene and an equilateral triangle. In any isosceles triangle the two angles in the triangle.