👉 Quadrilaminar is a geometric shape in three-dimensional space that has four edges. In geometry, it can be defined as an equilateral triangle with two sides of equal length and the third side being the same as the first or second side. The quadrilaminar shape is often used to represent a square or another regular polygon with four sides of equal length. It's also known as a trapezoid, but it has been simplified in various contexts for clarity.