A tetrahedron is a polyhedron with four sides (tetra means 4) that are triangles. So one fourth of a tetrahedron is a triangle.
Chat with our AI personalities
One: a tetrahedron is a single solid.
The ratios are "small to large".
In a molecule of phosphorus fluoride, the phosphorus atom is in the center, and it is surrounded by the three fluoride atoms which are arranged at three of the four points of a tetrahedron. (The fourth point of the tetrahedron contains an electron pair from the phosphorus atom.)
A four faced figure is a tetrahedron. If they are all congruent triangles, they are all equilateral triangles and it is a regular tetrahedron - one of the 5 Platonic Solids.
A tetrahedron.