1) Triangle geometry
Found on
https://www.crosswordclues.com/clue/semiperimeter
In geometry, the semiperimeter of a polygon is half its perimeter. Although it has such a simple derivation from the perimeter, the semiperimeter appears frequently enough in formulas for triangles and other figures that it is given a separate name. When the semiperimeter occurs as part of a formula, it is typically denoted by the letter s. ==Tria...
Found on
http://en.wikipedia.org/wiki/Semiperimeter
No exact match found.
