List questions from triangles

Published on 18 Jan 2017 - 23:01

36

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Can the value of 'c' be found out without a quadratic equation?

Published on 06 Apr 2026 - 11:03

171

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For all triangle prove that $\sum\limits_{cyc}m_a\cos\frac{\alpha}{2}\geq\frac{3}{4}(a+b+c)$

Published on 26 Mar 2026 - 21:27

51

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In search of such "miraculous" triangle doublets

Published on 31 Mar 2026 - 21:00

96

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Equal Equilateralizer Point in a tetrahedron

Published on 28 Mar 2026 - 0:28

189

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On the interval $ [1, 10]$, use factoring and the triangle inequality to prove $|x-y|≤2\sqrt{10}|\sqrt{x} - \sqrt{y}|$.

Published on 19 Jan 2017 - 20:58

80

Views

Trig complex sequence/series question

Published on 19 Jan 2017 - 21:04

4.1k

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Bisectors of a triangle meet at point.

Published on 06 Apr 2026 - 17:32

800

Views

Prove that two angles are equal

Published on 29 Mar 2026 - 5:11

47

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Difference between two interior lines of a triangle

Published on 21 Jan 2017 - 15:44

328

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How can I solve this Ceva formula problem?

Published on 01 Apr 2026 - 7:58

1.9k

Views

Given feet of altitudes, find vertices of the triangle

Published on 22 Jan 2017 - 8:18

333

Views

Find the area of the right triangle

Published on 22 Jan 2017 - 12:31

41

Views

Vector addition magnitude

Published on 22 Jan 2017 - 18:42

348

Views

Pons Asinorum solution: why is this so hard?

Published on 23 Jan 2017 - 18:57

List Question

How big is the equilateral triangle inscribed in a triangle?

Can the value of 'c' be found out without a quadratic equation?

For all triangle prove that $\sum\limits_{cyc}m_a\cos\frac{\alpha}{2}\geq\frac{3}{4}(a+b+c)$

In search of such "miraculous" triangle doublets

Equal Equilateralizer Point in a tetrahedron

On the interval $ [1, 10]$, use factoring and the triangle inequality to prove $|x-y|≤2\sqrt{10}|\sqrt{x} - \sqrt{y}|$.

Trig complex sequence/series question

Bisectors of a triangle meet at point.

Prove that two angles are equal

Difference between two interior lines of a triangle

How can I solve this Ceva formula problem?

Given feet of altitudes, find vertices of the triangle

Find the area of the right triangle

Vector addition magnitude

Pons Asinorum solution: why is this so hard?

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