The Pyramids ClipArt gallery offers 76 examples of solid geometric figures with a base that is a polygon and sides that are triangular in shape and meet at a common point at the top, known as the apex.

### Triangular Pyramids for Volume

Illustration showing that the volume of 2 triangular pyramids, having the same trihedral angle of the…

### Development of Rectangular Pyramid

The illustration of a rectangular pyramid unfolded by creating edges equal length to the base and meeting…

### Regular Tetrahedron

"Science has succeeded in classifying the thousands of known crystals in six systems, to each of which…

### Pyramid of the second order

"This is a form composed of twelve isoceles triangular faces, each of which intersects two of the horizontal…

### Sphenoid

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…

### Sphenoid

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…

### Sphenoid, positive and negative

"It consists of four isoceles triangular faces which intersect all three of the crystallographic axes,…

### Intersection of Square Pyramid and a Plane

Illustration of the intersection of a square pyramid and a plane.

### Intersection of Square Pyramid and a Plane

Illustration of the intersection of a square pyramid and a plane.

### Tetrahedron

"This is bounded by four equilateral triangles and is identical with the regular tetrahedron of geometry."…

### Negative tetrahedron

"The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all…

### Positive tetrahedron

"The tetrahedron is a form composed of four equilateral triangular faces, each of which intersects all…

### Positive and negative tetrahedrons

"If a positive and negative tetrahedron occured together with equal development, the resulting crystal…

### Development of a Triangular Pyramid

Development of a triangular pyramid.

### Plan and Elevation of a Triangular Pyramid

Plan and elevation of a triangular pyramid.

### Intersection of Triangular Pyramid and a Plane

Illustration of the intersection of a triangular pyramid and a plane.