In geometry, Heron's formula (or Hero's formula) gives the area of a triangle in terms of the three side lengths a , {\displaystyle a,} b , {\displaystyle b,} c . {\displaystyle c.} Letting s {\displaystyle s} be the semiperimeter of the triangle, s = 1 2 ( a + b + c ) {\displaystyle s={\tfrac {1}{2}}(a+b+c)} , the area A {\displaystyle A} is A = s ( s − a ) ( s − b ) ( s − c ) .
In geometry, Heron's formula (or Hero's formula) gives the area of a triangle in terms of the three side lengths a , {\displaystyle a,} b , {\displaystyle b,} c . {\displaystyle c.} Letting s {\displaystyle s} be the semiperimeter of the triangle, s = 1 2 ( a + b + c ) {\displaystyle s={\tfrac {1}{2}}(a+b+c)} , the area A {\displaystyle A} is A = s ( s − a ) ( s − b ) ( s − c ) .
Source: Wikipedia "Heron's formula" · CC BY-SA 4.0
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