List questions from euclidean-geometry

Published on 26 Apr 2026 - 9:00

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How to write sum notation for an array of 2D points

Published on 19 Dec 2015 - 16:36

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Parabola with given points

Published on 18 Apr 2026 - 22:59

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Prove that the circumcenter of a triangle lies on an angle bisector

Published on 20 Dec 2015 - 4:13

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Prove that $CDEF$ is a rectangle

Published on 20 Dec 2015 - 11:12

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Stick passing through glass leaves a possibly parabolic hole

Published on 20 Dec 2015 - 18:28

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Dual set of the unit ball is part of the unit ball.

Published on 27 Mar 2026 - 4:21

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In Euclid' s Elements, why is $\frac{\sqrt{a^ 2 - b^2}}{a}$ important in the definition of "apotome"?

Published on 22 Dec 2015 - 16:02

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Coordinate-free expression of a rotation

Published on 28 Mar 2026 - 20:57

137

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Finding and proving similar triangles

Published on 24 Apr 2026 - 1:44

164

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Parabola and straight line

Published on 28 Apr 2026 - 4:16

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Certain chords of a parameterized parabola pass through a common point

Published on 23 Dec 2015 - 13:34

242

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What is the simplest way to find $\frac{n}{7}th$ of a line with mathematical proof?

Published on 28 Mar 2026 - 15:20

51

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How does a group of transformations lead to a geometry?

Published on 28 Apr 2026 - 21:32

158

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Building Euclidean space

Published on 28 Mar 2026 - 22:24

List Question

Focal distance on a parabola

How to write sum notation for an array of 2D points

Parabola with given points

Prove that the circumcenter of a triangle lies on an angle bisector

Prove that $CDEF$ is a rectangle

Stick passing through glass leaves a possibly parabolic hole

Dual set of the unit ball is part of the unit ball.

In Euclid' s Elements, why is $\frac{\sqrt{a^ 2 - b^2}}{a}$ important in the definition of "apotome"?

Coordinate-free expression of a rotation

Finding and proving similar triangles

Parabola and straight line

Certain chords of a parameterized parabola pass through a common point

What is the simplest way to find $\frac{n}{7}th$ of a line with mathematical proof?

How does a group of transformations lead to a geometry?

Building Euclidean space

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