👉 In geometry, an antiprism is a type of prism that has its faces parallel to each other and opposite to one another. It can be thought of as a prism with one pair of opposite sides being parallel and the other pair of opposite sides being perpendicular. An antiprism is formed by taking a regular tetrahedron (a 3-dimensional shape composed of four equilateral triangles) and cutting it along its edges, leaving only the faces. The resulting figure is a pyramid
