Hadwiger-Finsler Inequality
Hadwiger-Finsler Inequality
For a triangle with side lengths , , , and area , the Hadwiger–Finsler inequality states that ++≥+++4, with equality holding if and only if the triangle is equilateral.
a
b
c
A
2
a
2
b
2
c
2
(a-b)
2
(b-c)
2
(c-a)
3
A