List questions from euclidean-geometry

Published on 11 Apr 2026 - 14:17

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Finding the smallest hypersphere with $\leq d+1$ boundary points in $\mathbb{R}^d$?

Published on 16 Apr 2026 - 1:29

156

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Explanation of ratio between radii of circles

Published on 09 Apr 2026 - 3:07

325

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Proving a Triangle relationship

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Show that the cones $ayz+bxz+cxy=0$ and $(ax)^{1/2}+(by)^{1/2}+(cz)^{1/2}=0$ are reciprocal.

Published on 14 Apr 2026 - 14:06

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An Application of Apollonius' Theorem

Published on 10 Apr 2026 - 13:27

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crumbled paper is Eucleadian or non Euclidean?

Published on 16 Apr 2026 - 12:32

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Calculate 3D triangle area by determinant

Published on 12 Apr 2026 - 17:47

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Are there any specific rules for proving geometric theorems?

Published on 10 Apr 2026 - 18:23

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How to show $\sigma_\phi \circ \sigma_\psi=\rho_{2(\phi-\psi)}$

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An acute triangle is inscribed in a circle. The resulting three minor arcs of the circle are reflected about the corresponding sides of the triangle.

Published on 14 Apr 2026 - 9:19

899

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Right Triangle(s) difficult problem.

Published on 08 Apr 2026 - 9:02

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Isometry of $\mathbb{R}^2 $with no fixed points is a translation

Published on 13 Apr 2026 - 8:23

240

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Can this describe a shape other than a parallelogram?

Published on 13 Apr 2026 - 1:16

770

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The Witch of Agnesi and its cartesian equation.

Published on 11 Apr 2026 - 18:39

List Question

How to construct a circle tangent to another circle and a line?

Finding the smallest hypersphere with $\leq d+1$ boundary points in $\mathbb{R}^d$?

Explanation of ratio between radii of circles

Proving a Triangle relationship

Show that the cones $ayz+bxz+cxy=0$ and $(ax)^{1/2}+(by)^{1/2}+(cz)^{1/2}=0$ are reciprocal.

An Application of Apollonius' Theorem

crumbled paper is Eucleadian or non Euclidean?

Calculate 3D triangle area by determinant

Are there any specific rules for proving geometric theorems?

How to show $\sigma_\phi \circ \sigma_\psi=\rho_{2(\phi-\psi)}$

An acute triangle is inscribed in a circle. The resulting three minor arcs of the circle are reflected about the corresponding sides of the triangle.

Right Triangle(s) difficult problem.

Isometry of $\mathbb{R}^2 $with no fixed points is a translation

Can this describe a shape other than a parallelogram?

The Witch of Agnesi and its cartesian equation.

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