👉 A pyramid is a geometric shape that has one base and at least two sides. The base of a pyramid is usually a polygon, with all its angles being right angles (90 degrees). The height of a pyramid can be determined by using trigonometry or measuring from the apex to the center of the base. The term "pyramid" refers to this geometric shape, which has applications in architecture and engineering. It also has other names such as obelisk, cone, and frustum