Prove that if a triangle has two sides equal, then it is isosceles

This can be easily proved using only the properties and notation of an isosceles triangle. It is known that a triangle is considered isosceles when its two sides are of the same length. Also, a triangle is considered isosceles if its two corners are the same size. For the proof, the presence of one of the properties will be sufficient. Since they come out one of the same. In the condition, we are told that the two sides of the triangle have the same length. This means that this triangle is isosceles.