Equilateral triangle terms of side length "a" can be derived directly using the Pythagorean theorem or using trigonometry. The area of a triangle is half of one side "a" times the height "h" from that side: The legs of either right triangle formed by an altitude of the equilateral triangle are half of the base "a", and the hypotenuse is the side "a" of the equilateral triangle. The height of an equilateral triangle can be found using the Pythagorean theorem so that Substituting "h" into the area formula (1/2)"ah" gives the area formula for the equilateral triangle: Using trigonometry, the area of
Jessie (given name) are Jane/Joan (Sìne), Janie (Sìneag), and Janet/Janice (Seònaid); though spelling may change slightly dependent upon the form of Gaelic (Irish or Scottish). An additional nickname for Jessie, heard in Scotland, is Jinty (or Jinny), a connection to Jean (female given name)/Jane/Jennie. Jessie is as an Anglicisation of the Gaelic root-word of "seas", meaning "to stand". In Irish Gaelige this is Seasaidh/Seasaídh (pro. "Sheh-see", emphasis on first syllable), which uses the fut. aff. conjugation of "seas". The Scots Gàidhlig variant is Seasaidh/Teasaidh/Teasag, (pronounced "Cheh-say"). Jessie (given name) Jessie is a given name in its own right, but may also be a