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) Jessie (given name) Jessie is a given name in its own right, but may also be a nickname for the given name Jessica. It is generally considered the feminine form of Jesse. The name Jess is also a given name. It, or Jesse, may be used in Spanish as a nickname for the male name Jesus. In Celtic usage, Jessie is not related to Jessica. It is considered a pet form of the name Jane or Jean (feminisations of John). This is expressed in Gaelic variants as the names Seana/Seóna (Shawna) or Sìne (Sheena). Related feminine names taken from John