Difference between revisions of "Pythagorean inequality"

(Created page with "The Pythagorean inequality is a generalization of the Pythagorean theorem, which states that in a right triangle with sides of length <math>a \leq b \leq c</math> we h...")
 
m
Line 10: Line 10:
 
* [[Law of cosines]]
 
* [[Law of cosines]]
  
[[Category:Inequality]]
 
 
[[Category:Geometry]]
 
[[Category:Geometry]]
[[Category:Theorems]]
+
[[Category:Geometric Inequalities]]

Revision as of 16:55, 29 December 2021

The Pythagorean inequality is a generalization of the Pythagorean theorem, which states that in a right triangle with sides of length $a \leq b \leq c$ we have $a^2 + b^2 = c^2$. This inequality extends this to obtuse and acute triangles. The inequality says:

For an acute triangle with sides of length $a \leq b \leq c$, $a^2+b^2>c^2$. For an obtuse triangle with sides $a \leq b \leq c$, $a^2+b^2<c^2$.

This inequality is a direct result of the Law of cosines, although it is also possible to prove without using trigonometry.

See also