Question

Trisecting an angle with a compass and 2 marks on a ruler

score 81 · Answer 1 · 2026-03-26 22:58:38

81

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Trisecting an angle with a compass and 2 marks on a ruler

Published on 26 Mar 2026 - 22:58

score 86 · Answer 2 · 2026-04-11 02:24:54

86

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How to get the left and right rotation quaternions between two $\mathbb{R}^4$ unit vectors?

Published on 11 Apr 2026 - 2:24

score 102 · Answer 3 · 2026-04-05 11:59:26

102

Views

$3(a+{1\over a}) = 4(b+{1\over b}) = 5(c+{1\over c})$ and $ab+bc+ca=1$

Published on 05 Apr 2026 - 11:59

score 149 · Answer 4 · 2026-03-31 21:02:55

149

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Ratio of the heights of triangle is given, determine the sides of triangle.

Published on 31 Mar 2026 - 21:02

score 70 · Answer 5 · 2026-03-29 05:12:24

70

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Is there a citation or (at least a date) to ascribe to Conway's Circle Theorem?

Published on 29 Mar 2026 - 5:12

score 138 · Answer 6 · 2020-05-20 19:56:00

138

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The altitude of an isosceles trapezoid; given area and diagonal

Published on 20 May 2020 - 19:56

score 158 · Answer 7 · 2026-03-31 22:47:32

158

Views

Recommend book on elementary geometry

Published on 31 Mar 2026 - 22:47

score 532 · Answer 8 · 2026-03-26 22:55:38

532

Views

Construct a circle tangent to sides $BC$ and $CD$ and s.t. its meetings with the diagonal $BD$ are tangent points from tangents draw from point $A$

Published on 26 Mar 2026 - 22:55

score 203 · Answer 9 · 2026-04-10 16:19:41

203

Views

Right tangential trapezoid

Published on 10 Apr 2026 - 16:19

score 343 · Answer 10 · 2026-03-26 22:54:14

343

Views

Straightedge-and-compass construction of the "kissing circles" for three given circles

Published on 26 Mar 2026 - 22:54

score 63 · Answer 11 · 2026-04-10 20:21:27

63

Views

Rotating the Sides of a Quadrilateral Rotates its Diagonals

Published on 10 Apr 2026 - 20:21

score 660 · Answer 12 · 2026-04-03 09:26:28

660

Views

Prove that A',B',C' are in a straight line.

Published on 03 Apr 2026 - 9:26

score 58 · Answer 13 · 2026-04-05 11:57:42

58

Views

Perimeter and area of a right triangle

Published on 05 Apr 2026 - 11:57

score 60 · Answer 14 · 2020-05-22 17:16:45

60

Views

Solving systems of equations by means of geometric construction

Published on 22 May 2020 - 17:16

score 233 · Answer 15 · 2020-05-22 17:45:40

233

Views

Find the radius of the circle given in the picture below.

Published on 22 May 2020 - 17:45

List Question

Trisecting an angle with a compass and 2 marks on a ruler

How to get the left and right rotation quaternions between two $\mathbb{R}^4$ unit vectors?

$3(a+{1\over a}) = 4(b+{1\over b}) = 5(c+{1\over c})$ and $ab+bc+ca=1$

Ratio of the heights of triangle is given, determine the sides of triangle.

Is there a citation or (at least a date) to ascribe to Conway's Circle Theorem?

The altitude of an isosceles trapezoid; given area and diagonal

Recommend book on elementary geometry

Construct a circle tangent to sides $BC$ and $CD$ and s.t. its meetings with the diagonal $BD$ are tangent points from tangents draw from point $A$

Right tangential trapezoid

Straightedge-and-compass construction of the "kissing circles" for three given circles

Rotating the Sides of a Quadrilateral Rotates its Diagonals

Prove that A',B',C' are in a straight line.

Perimeter and area of a right triangle

Solving systems of equations by means of geometric construction

Find the radius of the circle given in the picture below.

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