Question

Dissection of equilateral triangle into square with flipping pieces - variation of Henry Dudeney's problem

score 688 · Answer 1 · 2026-04-12 11:34:13

688

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Dissection of equilateral triangle into square with flipping pieces - variation of Henry Dudeney's problem

Published on 12 Apr 2026 - 11:34

score 37 · Answer 2 · 2026-04-14 13:36:53

37

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Triangle Properties application

Published on 14 Apr 2026 - 13:36

score 243 · Answer 3 · 2026-04-15 03:33:03

243

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Proving that $a \cos A+b\cos B+c \cos C$ is the semi-perimeter of $\triangle ABC$

Published on 15 Apr 2026 - 3:33

score 154 · Answer 4 · 2026-04-12 23:40:32

154

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Prove if the set of triangles X is countable?

Published on 12 Apr 2026 - 23:40

score 54 · Answer 5 · 2026-04-11 05:47:00

54

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Trying to find if this trigonometry problem is wrong or not

Published on 11 Apr 2026 - 5:47

score 321 · Answer 6 · 2026-04-13 06:32:57

321

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Finding angle in a triangle with one median and an isosceles triangle in it

Published on 13 Apr 2026 - 6:32

score 54 · Answer 7 · 2026-04-14 23:40:30

54

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$\triangle ABC$ is iscosceles and orthogonal, with $\angle BAC=90^o$, $DE//BC$ and $BD=BM$. Find how many degrees $\angle MDE$ is equal to

Published on 14 Apr 2026 - 23:40

score 103 · Answer 8 · 2026-04-13 16:06:05

103

Views

Proving that given a triangle $ABC$ the line $AB$ is parallel to $CK$

Published on 13 Apr 2026 - 16:06

score 62 · Answer 9 · 2026-04-12 10:47:47

62

Views

Finding the area of a triangle from subareas

Published on 12 Apr 2026 - 10:47

score 83 · Answer 10 · 2026-04-17 14:49:47

83

Views

For similar triangles ADG, BDF, and CDE, find EF given AB, BC, and DE

Published on 17 Apr 2026 - 14:49

score 121 · Answer 11 · 2026-04-09 03:16:33

121

Views

Geometric Mirror Problem with light beam

Published on 09 Apr 2026 - 3:16

score 157 · Answer 12 · 2026-04-12 06:29:53

157

Views

How to find angle at centroid of triangle by its edge lengths?

Published on 12 Apr 2026 - 6:29

score 248 · Answer 13 · 2026-05-10 19:47:09

248

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Find the measure of $\angle G$ in a triangle

Published on 10 May 2026 - 19:47

score 168 · Answer 14 · 2026-04-14 10:10:32

168

Views

Geometry - length of triangle question

Published on 14 Apr 2026 - 10:10

score 39 · Answer 15 · 2026-04-15 05:58:21

39

Views

Altitude lines dont appear to be perpendicular to triangle sides in botched orthocenter calculation attempt

Published on 15 Apr 2026 - 5:58

List Question

Dissection of equilateral triangle into square with flipping pieces - variation of Henry Dudeney's problem

Triangle Properties application

Proving that $a \cos A+b\cos B+c \cos C$ is the semi-perimeter of $\triangle ABC$

Prove if the set of triangles X is countable?

Trying to find if this trigonometry problem is wrong or not

Finding angle in a triangle with one median and an isosceles triangle in it

$\triangle ABC$ is iscosceles and orthogonal, with $\angle BAC=90^o$, $DE//BC$ and $BD=BM$. Find how many degrees $\angle MDE$ is equal to

Proving that given a triangle $ABC$ the line $AB$ is parallel to $CK$

Finding the area of a triangle from subareas

For similar triangles ADG, BDF, and CDE, find EF given AB, BC, and DE

Geometric Mirror Problem with light beam

How to find angle at centroid of triangle by its edge lengths?

Find the measure of $\angle G$ in a triangle

Geometry - length of triangle question

Altitude lines dont appear to be perpendicular to triangle sides in botched orthocenter calculation attempt

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