A beautiful triangle inequality
30044
Inequality with triangle sides
99644
Finding an Upper Bound on This Inequality
19078
Prove an interpolation inequality
134764
Triangle Inequality question with fractions
36758
Triangle inequality for L2 norm
106816
Medians of a triangle and similar triangle properties
138316
A simple inequality for floor function
95116
Frobenius Norm Triangle Inequality
59675
A inequality proposed at Zhautykov Olympiad 2008
91053
Simple proof that equilateral triangles have maximum area
140299
Inequality based on triangle: $\frac{3}{2}\le\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}<2$
81975
Sequence of triangles with exponentiated sides
136290
a mathematical problem on inequalities
68986
Use the triangle inequality to show that $|a|+|b| \leq |a+b|+|a-b|$
32963
proving the inequality $\triangle\leq \frac{1}{4}\sqrt{(a+b+c)\cdot abc}$
83449
Proof with 3D vectors
27587
inequality on the unit disk