There have been crayons created that are a tetrahedral shape, so that the children are able to grab the crayon in any position.
Tetrafluoroborate adopts a tetrahedral shape, similar to that of methane.
As such, it should form a volatile tetroxide, HsO4, due to the tetrahedral shape of the molecule.
Modern theories view the current continental configurations as only transitory, so give no special role to the tetrahedral shape.
A small number of species even have tetrahedral or cuboidal shapes.
If only 180 turns are made, it is possible to scramble only the colors while retaining the puzzle's tetrahedral shape.
This configuration leads to highly symmetrical structures, hence the tetrahedral shape of the molecule.
Ammonia seems to have a flattened or exaggerated tetrahedral shape.
It has a tetrahedral shape and it is a recognized ozone-depleting chemical.
The best geometry to reduce the repulsion is a tetrahedral shape.
