The apex of the pyramid is positioned at the top vertex. All of the pyramid's sides come together here. Three triangular sides meet at the peak of a triangle pyramid atop **a triangular base**. The remaining side of the pyramid is called the pyramidal cap.

A pyramid has no defined bottom because it is a pointy-headed structure. However, you can consider its base to be the area it covers when placed on a flat surface. A pyramid's base is always equal in size to one of its sides. There are two types of bases for a pyramid: square and rectangular.

A square base pyramid has four equal sides. These sides can be calculated by using the formula: S = 1/2*base*height. In **this case**, "s" is squared footage and the "1/2" factor comes from adding half of **each side** of a rectangle. You can also think of **a square base pyramid** as being "as wide as it is high".

A rectangular base pyramid has two opposite sides that are equal in length and another pair of sides that are equal in length. These lengths can be found by using the same formula as before with "r" instead of "s": R = 1/2*base*height. Think of a rectangular base pyramid as being "as long as it is high".

The apex of a pyramid or cone is the vertex at the "top" (opposite the base). The vertex of a pyramid is the point that connects all of **the lateral faces** or where all of the lateral edges meet. The term apex is also used for the highest point on an object. The word comes from **a Greek phrase** meaning "pointing to the gods", referring to the belief that the shape resembled a point-studded crown worn by Zeus.

There are several terms used to describe the "apex" of a pyramid: summit, high point, top, and so on.

Zeus was the king of the gods in **ancient Greece**. He was one of the main characters in the Myths of Ancient Greece collection of myths and stories that were often used as propaganda to promote the culture of Athens during its period of dominance over other city-states within Greece.

In mathematics, an apex is the most elevated point on a surface with flat sides. In geometry, the three apices of a triangle are the points of intersection of the opposite side with each of the other two angles.

Any polygon can serve as the base of a pyramid. We'll focus on the case where the base is a triangle. A triangular pyramid is one that has a triangle as its base. A triangular pyramid has **three triangular faces** since the base is a triangle and a triangle has **three sides**. Thus, a triangular pyramid has **six sides** all together.

Triangular pyramids were widely used in ancient Egypt. They are still made today in some parts of the world such as Vietnam and India.

The Egyptians made use of **their knowledge** of geometry to create some impressive structures out of stone. Some of these structures remain standing even today. Among these structures is an example of a triangular pyramid: the Great Pyramid at Giza. The Great Pyramid was built for King Khufu and is based on the principle of geometric progression; that is, each new level will be equal to the previous one in height. The base of the Great Pyramid is approximately 513 feet (155 m) long and 112 feet (34 m) wide. It contains two chambers inside itself. This means that the pyramid has three floors total.

There are other types of pyramids besides triangular ones. There are also rectangular pyramids and square pyramids. Rectangular pyramids have four straight-sided planes and they're used to represent the corners of a room. Square pyramids have only two sides and a floor. They're usually used to represent tombstones.

Toggle the text. A pyramid with **four triangular sides** is called a triangle pyramid. The base can be any shape or size of triangle, although it is often an equilateral triangle (all sides are the same). This indicates that the three sides of the pyramid are the same size, and the pyramid appears the same when rotated.

A tetrahedron is a four sided pyramid with flat faces. There are many varieties of tetrahedron, but they all have four flat surfaces and no edges between them. Tetrahedral shapes appear in many materials used in architecture and engineering designs: concrete, glass, metal, etc. They also occur naturally, for example in the shell of some turtles and birds.

A triacontahedron has 30 triangles and 12 edges. It is one of the more common polyhedrons, and can be constructed by starting with a regular dodecahedron (12 pentagons) then adding 6 more vertices in its center, forming three equilateral triangles around **each new vertex**. Thus, there are 30 triangles total and the triacontahedron is symmetric with respect to **all axes** of symmetry of the dodecahedron.

A truncated triacontahedron has only 28 triangles and 12 edges. It can be formed by removing **the central hexagon** from a triacontahedron.