Question

Construction of a triangle

score 377 · Answer 1 · 2026-03-26 07:56:54

377

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Construction of a triangle

Published on 26 Mar 2026 - 7:56

score 432 · Answer 2 · 2014-08-25 15:55:19

432

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In any triangle ABC, the expression $(a + b + c) (a + b - c) (b + c - a) (c + a - b)$ is equal to

Published on 25 Aug 2014 - 15:55

score 1.6k · Answer 3 · 2014-08-25 20:40:10

1.6k

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Prove triangle made from two altitudes and midpoint is isosceles

Published on 25 Aug 2014 - 20:40

score 2.3k · Answer 4 · 2014-08-25 21:21:04

2.3k

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Prove triangles formed by two midpoints and an altitude are congruent

Published on 25 Aug 2014 - 21:21

score 94 · Answer 5 · 2014-08-26 15:35:11

94

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Trigonometry and triangle proof

Published on 26 Aug 2014 - 15:35

score 2.6k · Answer 6 · 2014-08-27 03:20:46

Can one deduce whether a given quantity is possible as the area of a triangle when supplied with the length of two of its sides?

score 561 · Answer 7 · 2014-08-27 16:02:04

561

Views

Right-Angled Isosceles Triangle covering puzzle

Published on 27 Aug 2014 - 16:02

score 128 · Answer 8 · 2014-08-29 01:56:40

128

Views

Triangle Inequality on complex numbers

Published on 29 Aug 2014 - 1:56

score 2.2k · Answer 9 · 2014-08-29 02:23:07

2.2k

Views

Proving that an equilateral triangle in the plane cannot have vertices on integer lattice points

Published on 29 Aug 2014 - 2:23

score 804 · Answer 10 · 2014-08-31 07:22:04

804

Views

The concurrence of angle bisector, median, and altitude in an acute triangle

Published on 31 Aug 2014 - 7:22

score 5.4k · Answer 11 · 2014-08-31 14:41:48

5.4k

Views

Are all triangles where "$a^2 = b^2+ c^2$", right-angled?

Published on 31 Aug 2014 - 14:41

score 67 · Answer 12 · 2014-08-31 22:38:36

67

Views

Create dynamic cities of perspective angle x

Published on 31 Aug 2014 - 22:38

score 71 · Answer 13 · 2014-09-01 17:20:42

71

Views

A simple geometry question

Published on 01 Sep 2014 - 17:20

score 17k · Answer 14 · 2026-03-26 12:47:55

17k

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What is the flaw in this proof that all triangles are isosceles?

Published on 26 Mar 2026 - 12:47

score 52 · Answer 15 · 2014-09-04 05:53:08

52

Views

How find the least value of the expression: $M = \cot^2 A + \cot^2 B + \cot^2 C + 2(\cot A - \cot B)(\cot B - \cot C)(\cot C - \cot A)$?

Published on 04 Sep 2014 - 5:53

List Question

Construction of a triangle

In any triangle ABC, the expression $(a + b + c) (a + b - c) (b + c - a) (c + a - b)$ is equal to

Prove triangle made from two altitudes and midpoint is isosceles

Prove triangles formed by two midpoints and an altitude are congruent

Trigonometry and triangle proof

Can one deduce whether a given quantity is possible as the area of a triangle when supplied with the length of two of its sides?

Right-Angled Isosceles Triangle covering puzzle

Triangle Inequality on complex numbers

Proving that an equilateral triangle in the plane cannot have vertices on integer lattice points

The concurrence of angle bisector, median, and altitude in an acute triangle

Are all triangles where "$a^2 = b^2+ c^2$", right-angled?

Create dynamic cities of perspective angle x

A simple geometry question

What is the flaw in this proof that all triangles are isosceles?

How find the least value of the expression: $M = \cot^2 A + \cot^2 B + \cot^2 C + 2(\cot A - \cot B)(\cot B - \cot C)(\cot C - \cot A)$?

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