In a triangle, the sum of two sides must be greater than the third side, which is called trigonometric inequality. Although the trigonometric inequality is simple, it is the most basic conclusion in plane geometric inequality, including generalized Ptolemy theorem, Euler theorem and Euler inequality. Finally, inequality relations can be derived by this inequality.

Triangle inequality:

a+b>c, b+c>a, c+a>b.

|a-b|< c < a + b.

Enter either side

Side 1:5

Side 2:6

Click "calculate" to output the result

Side 3: < 11

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