Why equilateral triangle opposite sides are equal. I knew equilateral triangle all sides are equal,but I want a reason why equilateral triangle opposite sides are equal. Plz tell fast and in detail, very urgent not that much fast but as soon as possible.

Dear Student,
An equilateral triangle has the property that all three interior angles are equal that is equilateral triangle is also equiangular, so sides corresponding to equal angles are equal in length. This is the main reason why equilateral triangle has all sides equal.
Regards.