Category:Definitions/Species

This category contains definitions related to Species.
Related results can be found in Category:Species.

In a spherical triangle, two angles, two sides, or an angle and a side are of the same species if and only if:

both are between $0 \degrees$ and $90 \degrees$

or:

both are between $90 \degrees$ and $180 \degrees$.

Otherwise they are of opposite species.