Altitude of a triangle

Description

The altitude of a triangle is the distance from a vertex perpendicular to the opposite side. There is a relation between the altitude and the sides of the triangle, using the term of semiperimeter too.
( The semiperimeter of a triangle is half its perimeter.)

Related formulas

Variables

hAltitude to side a (m)
aSide corresponding to altitude h (m)
ssemiperimeter (m)
bside of the triangle (m)
cside of the triangle (m)