prisms pyramids sphere cylinder
Triangular based pyramid with no bottom. That is, if you meant 3-D shapes, presumably?
A cube.
They are alike because they are both 3-D shapes
There are different formulae for different shapes and these vary in complexity.
Icosahedron are 3-D solid shapes with 20 triangualr faces. They are used as dice is many games, such as Dungeons & Dragons.
3-d shapes are not made from 2-d shapes. 3-d shapes may have projections onto a plane that are 2-d.
There are infinitely many 3-D shapes so it is not possible to name them individually.
If you can make it just by cutting it out of a piece of paper, it's 2-d. If you can make it by carving a block of wood, it's 3-d. 2-d shapes have length and width, but not height. 3-d shapes have length, width, and height. Here's an example: a rectangle might be 2" long and 5" wide, but those are the only numbers you use, so it's a 2-d shape. A house is 60' long, 25' wide, and 10' tall, so it's 3-d.
3 dimensional shapes have breadth, width and depth whereas 2 dimensional shapes have only breadth and width
Polyhedrons
-hedra.
Triangular based pyramid with no bottom. That is, if you meant 3-D shapes, presumably?
Yes, there are 4-D shapes, also known as four-dimensional polytopes or "polychora." Just as 3-D shapes are defined in three spatial dimensions, 4-D shapes extend this concept into a fourth dimension. While we cannot directly visualize four dimensions, we can represent 4-D shapes mathematically or through projections into 3-D space, similar to how a 3-D object casts a 2-D shadow. Examples include the hypercube (or tesseract) and the 24-cell.
circles and ovals In 3-D, spheres and oblate spheroids
No because isosceles triangles are 2 dimensional shapes.
There are no triangular prisms in faces. Faces are 2-d shapes and these cannot contain 3-d shapes in them.
There are infinitely many such shapes. There are infinitely many such shapes. There are infinitely many such shapes. There are infinitely many such shapes.