A tetrahydron is a triangular pyramid having congruent equilateral triangles for each of its faces.
A rectangle has 4 faces: 2 long faces and 2 short faces.
10 faces 10 faces
no faces
A trapezoid is a quadrilateral and has four faces.
A hexahedron has 6 faces.
You can't get a three dimensional triangle - but you can have a triangular prism. Its also known as a triangular based pyramis - or to be really precise, a tetrahydron.
Twelve faces.
it has six faces
6 faces
3 faces
20 faces