3 dimensional figures with triangular sides? Prisms and Pyramids
2 dimensional figures that can be divided into traingles? Any n-gon with n > 3 can be divided into n-2 triangles.
no
A tetrahedron.
A pyramid
Isosceles TetrahedronA solid with four faces is a tetrahedron. Each of the faces is a triangle. If all the triangles are congruent, you have an isosceles tetrahedron.
Its name is called a square based pyramid.
Octohedron, or diamond
square base pyramid and a triangular base pyramid
geometric solid
Traditional geometric figures have dimensions which are integers: 0 for a point, 1 for a line or Mobius strip, 2 for a plane figure or Klein bottle, and 3 for a solid. Fractals have dimensions which are not integers.
A pyramid. The square being the base and the triangles the 'sides' - each having a side connected to a side of the square - the other sides connected to 'neighbor-triangles'.
Well if you mean triangular pyramid and triangular prism then: A triangular pyramid is a geometric solid with a base that is a triangle and all other faces are triangles with a common vertex. A triangular prism is a geometric solid with two bases that are congruent (identical), parallel triangles and all other faces are parallelograms. It is referred to as a right triangular prism if the faces are rectangles.
The maximum number of equilateral triangles that can meet at a vertex to form a solid is 4. This configuration forms a tetrahedron, where each vertex is shared by four equilateral triangle faces. Any arrangement with more than four triangles at a single vertex would not be able to maintain the necessary geometric properties to form a solid.