triangular pyramid.
Tetrahedron
A 3d shape can have infinite sides
it is a 3D shape and has 4 sides
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
A pyramid. Triangular base and three connected sides equal a pyramid.
A right square based pyramid.
sides are the face of a 3d shape and verticies are the corner of the shape
square
That is a Dodecahedron.
A septadecahedron has 17 sides to it.
Pentadecagon; Pentakaidecagon
a parrollellogram * * * * * No, a parrollollogram - or even a parallelogram - is not a 3d shape! The correct answer is a tetrahedron or a triangle based pyramid.