cube
it is a 3 dimentional triangle ... it can be a pyramid with 5 sides ... or one with four sides
2D - the triangle 3D - the tetrahedron (i.e. it has a triangle on each side and there are 4 sides.
It depends on the axis around which the triangle is rotated to generate the 3-d version. If rotated about the hypotenuse, you would get a circular wedge. If either of the other sides, you would get a cone.
No because it is a 2 dimensional triangle having 2 equal sides and 2 equal base angles
cube
it is a 3 dimentional triangle ... it can be a pyramid with 5 sides ... or one with four sides
If it's a proper 3D triangle, it's a tetrahedron. It has four sides, all triangular. If it has four triangular sides and a square base, it's a pyramid.
A 3-D TRIANGLE cannot have 5 sides.
a 3d objet with all flat sides
2D - the triangle 3D - the tetrahedron (i.e. it has a triangle on each side and there are 4 sides.
It depends on the axis around which the triangle is rotated to generate the 3-d version. If rotated about the hypotenuse, you would get a circular wedge. If either of the other sides, you would get a cone.
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
a polyhedron is any 3d figure with all flat polygons for sides(polygons have straight sides)
a 3d object made of 2d faces with all flat sides
No because it is a 2 dimensional triangle having 2 equal sides and 2 equal base angles
If you're talking about a pyramid - it has either four or five sides (including the base) depending on how it's constructed.