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f you looked at the bottom of a pyramid and saw a right triangle it would be a right triangular prism. It would have 3 triangular faces extending up from the bottom. The last sentence refers to a right tetrahedron, not a prism. A triangular prism has two triangles at either end, and three rectangles joining them - like a pencil with a triangular cross-section.
The Platonic solids in modern Euclidean geometry are five regular polyhedra. These are three-dimensional objects that are bounded by regular polygonal faces. They are: Tetrahedron (or triangular pyramid): 4 triangular faces; Hexahedron (cube): 6 square faces; Octahedron: 8 triangular faces; Dodecahedron: 12 pentagonal faces; Icosahedron: 20 triangular faces. See link for more.
You count them. Let's look at a square, it has 4 edges. Just count the sides of the shape. Vertice = corners (point) Faces = the flat surface areas Edges = sides of the shape that makes up the shape like the outline of a shape.
it does not have four it has five look it up people thanks to this i have got all my answers wrong and im doing a test put the correct answer next time sorry if this was rude.
it is shapes that look 3-Dexamples . cube,hexagonal prism,sphere,rectangular prism,triangular pyramid,square pyramid and much more other but these are the figures i could think ofask your teacher for more 3-D figures and facts about those figures thank you^.^ have a good day!