Question

Sangaku - Find diameter of congruent circles in a $9$-$12$-$15$ right triangle

score 1.7k · Answer 1 · 2026-03-22 08:14:08

1.7k

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Sangaku - Find diameter of congruent circles in a $9$-$12$-$15$ right triangle

Published on 22 Mar 2026 - 8:14

score 60 · Answer 2 · 2018-05-31 17:16:32

60

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Alternative proof that all inscribed angles with the same arc are congruent

Published on 31 May 2018 - 17:16

score 192 · Answer 3 · 2026-03-26 03:12:36

192

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Find the coordinates of a path of a moving point in a triangle with 2 fixed points

Published on 26 Mar 2026 - 3:12

score 92 · Answer 4 · 2018-05-31 23:19:36

92

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A coordinate proof that every polygon with a circumscribed circle is convex

Published on 31 May 2018 - 23:19

score 537 · Answer 5 · 2026-03-22 19:13:16

537

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How to Show that an $n$-finned Hyperplane is not Homeomorphic to $\mathbb{R}^m$

Published on 22 Mar 2026 - 19:13

score 155 · Answer 6 · 2018-06-01 16:59:44

155

Views

A segment tangent to the incircle.

Published on 01 Jun 2018 - 16:59

score 817 · Answer 7 · 2026-03-26 12:40:38

817

Views

Complete quadrilateral: projective version of Newton-Gauss line

Published on 26 Mar 2026 - 12:40

score 79 · Answer 8 · 2026-03-25 07:48:39

79

Views

Calculating a point on a straight line which is "t" distance away from a fixed point on the same straight line using parametric equations

Published on 25 Mar 2026 - 7:48

score 327 · Answer 9 · 2026-03-25 01:16:49

327

Views

Where is the hole in this argument asserting the constructibility of all regular polygons?

Published on 25 Mar 2026 - 1:16

score 395 · Answer 10 · 2026-03-25 15:33:14

395

Views

A well-known lemma about curvilinear circles!

Published on 25 Mar 2026 - 15:33

score 259 · Answer 11 · 2018-06-02 15:10:37

259

Views

Kissing points of circle packing on a circle?

Published on 02 Jun 2018 - 15:10

score 239 · Answer 12 · 2018-06-02 16:03:46

239

Views

Find the height of the trapezoid - is there enough information?

Published on 02 Jun 2018 - 16:03

score 158 · Answer 13 · 2026-03-25 06:02:25

158

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Is every proposition on Cartesian geometry provable on synthetic Euclidean geometry?

Published on 25 Mar 2026 - 6:02

score 5.3k · Answer 14 · 2018-06-03 19:36:53

5.3k

Views

Why does the circle intersect the line?

Published on 03 Jun 2018 - 19:36

score 126 · Answer 15 · 2026-03-26 06:28:45

126

Views

Find the ratio between two segments of a similar triangle.

Published on 26 Mar 2026 - 6:28

List Question

Sangaku - Find diameter of congruent circles in a $9$-$12$-$15$ right triangle

Alternative proof that all inscribed angles with the same arc are congruent

Find the coordinates of a path of a moving point in a triangle with 2 fixed points

A coordinate proof that every polygon with a circumscribed circle is convex

How to Show that an $n$-finned Hyperplane is not Homeomorphic to $\mathbb{R}^m$

A segment tangent to the incircle.

Complete quadrilateral: projective version of Newton-Gauss line

Calculating a point on a straight line which is "t" distance away from a fixed point on the same straight line using parametric equations

Where is the hole in this argument asserting the constructibility of all regular polygons?

A well-known lemma about curvilinear circles!

Kissing points of circle packing on a circle?

Find the height of the trapezoid - is there enough information?

Is every proposition on Cartesian geometry provable on synthetic Euclidean geometry?

Why does the circle intersect the line?

Find the ratio between two segments of a similar triangle.

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