List questions from euclidean-geometry

Published on 12 Apr 2026 - 0:34

133

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Euclidean distance and turn cost

Published on 13 Apr 2026 - 14:33

63

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Optimization of a line, an application of the smallest circles problem

Published on 10 Apr 2026 - 23:41

5.6k

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Locus of centre of circle passing through concyclic points

Published on 13 Apr 2026 - 16:18

318

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9 points in a unit square with pairwise distances greater than $\frac12$

Published on 15 Apr 2026 - 23:15

254

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A problem about the median of a triangle.

Published on 12 Apr 2026 - 22:08

153

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Connected components of a given set

Published on 15 Apr 2026 - 2:39

625

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How to work with triangle inequality using rational coordinates and squared distance?

Published on 11 Apr 2026 - 22:17

294

Views

Identifying the type of conic using its symmetric matrix in the extended Euclidean plane

Published on 14 Apr 2026 - 5:08

163

Views

Sum of distance to odd vertices = Sum of distance to even vertices in regular polygon

Published on 15 Apr 2026 - 7:47

426

Views

Orthocentre of triangle in cyclic qudrilateral

Published on 09 Apr 2026 - 3:57

168

Views

Definition of "centroid" before the invention of vectors or coordinate system?

Published on 12 Apr 2026 - 23:10

797

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Proportions of an isosceles triangle whose orthocentre lies on the incircle

Published on 12 Apr 2026 - 15:58

89

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Prove that $\vec{AI}.\vec{BH}=0$

Published on 15 Apr 2026 - 21:14

99

Views

Prove that a tetrahedral angle can be intersected by a plane in such a way that the cross section is a parallelogram.

Published on 16 Apr 2026 - 6:10

List Question

A conjecture about an angle on a solid body

Euclidean distance and turn cost

Optimization of a line, an application of the smallest circles problem

Locus of centre of circle passing through concyclic points

9 points in a unit square with pairwise distances greater than $\frac12$

A problem about the median of a triangle.

Connected components of a given set

How to work with triangle inequality using rational coordinates and squared distance?

Identifying the type of conic using its symmetric matrix in the extended Euclidean plane

Sum of distance to odd vertices = Sum of distance to even vertices in regular polygon

Orthocentre of triangle in cyclic qudrilateral

Definition of "centroid" before the invention of vectors or coordinate system?

Proportions of an isosceles triangle whose orthocentre lies on the incircle

Prove that $\vec{AI}.\vec{BH}=0$

Prove that a tetrahedral angle can be intersected by a plane in such a way that the cross section is a parallelogram.

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