isoceles

An isosceles triangle is a triangle that has at least two sides of equal length. This symmetry also means that the angles opposite those equal sides are themselves equal. The shape is characterized by its balanced appearance, with two sides matching and the angles at the base mirroring each other. Isosceles triangles are common in architecture and design because of their balanced proportions and stability. They can be equilateral if all three sides are equal, but generally, "isosceles" specifically refers to having just two equal sides.