3-d shapes are not made from 2-d shapes. 3-d shapes may have projections onto a plane that are 2-d.
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3 dimensional shapes have breadth, width and depth whereas 2 dimensional shapes have only breadth and width
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yes
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.
No, they have only one face.
2d shape is a dimension
There are no triangular prisms in faces. Faces are 2-d shapes and these cannot contain 3-d shapes in them.
Polygonal (2-d) shapes get their (not there) names from the number of sides; polyhedra (3-d) shapes get their names from the number of faces.The names of other shapes: circles, ellipses, torus, cardioid etc have different origins.
They are closed 2-D shapes with straight sides.