👉 In geometry, a bipyramid is a 3-dimensional shape that has two pyramids as its bases. It is named after the bipyramid theorem, which states that every polyhedron can be constructed from at least three pyramids (or cubes) by joining their vertices with edges. Bipyramidal shapes are often used in architecture and design to create large-scale structures such as buildings or bridges. They have been used in various fields such as engineering, physics, and computer graphics to