pyramid
There are 12 lateral faces (triangles) and one base so altogether there are 13 faces.
3. You wanna know how?? First there are 3 triangles that touch the base, so there are only 3 lateral faces. :)
lateral faces
There is a contradiction in your question. If the base has four equal sides then is it a square so not all the faces are Triangles. However if the base is a square and the rest of the faces are triangles then your object is a "Square-based Pyramid"
pyramid
There are 12 lateral faces (triangles) and one base so altogether there are 13 faces.
A pyramid
3. You wanna know how?? First there are 3 triangles that touch the base, so there are only 3 lateral faces. :)
One side will be a square. It is the base. The lateral sides are triangles.
the difference between a pyramid and prism (in geometry) is that a pyramid has one base and lateral faces that are triangles where prisms have two congruent bases and lateral faces that are parallelograms
lateral faces
Three or more, as many as the number of sides of the base. Pyramids can have base that are triangles, squares rectangles, or any planar polygon.
The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).The area of the polygonal base, and the areas of each of its lateral faces (which need not be equal).
8 lateral faces and a base
8 lateral faces and a base
A pyramid has a polygonal base with all other sides being triangles. As the Egyptians famously demonstrated, a common pyramid has a square base with four triangles meeting at a vertex, but any polygon - regular or irregular - can be used as the base of such a polyhedron.