Altitude of a triangle
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.)
|h||Altitude to side a (m)|
|a||Side corresponding to altitude h (m)|
|b||side of the triangle (m)|
|c||side of the triangle (m)|