List questions from euclidean-geometry

Published on 25 Mar 2026 - 23:36

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Find Circle from Tangent Line and Two Points

Published on 22 May 2014 - 14:50

47

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What do you call a projection of a hyperplane into a finite hypercube that keeps paraxial lines straight?

Published on 23 May 2014 - 18:30

468

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Euclidean geometry and irrational numbers.

Published on 30 Mar 2026 - 6:18

137

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Is there relations between earth mover's distance and vector norms?

Published on 25 May 2014 - 15:28

365

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Regular polygons constructed inside regular polygons

Published on 25 Mar 2026 - 15:56

390

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Show how to map the semicircle $x^2 +y^2 = 1$, $y > 0$, onto $(x−1)^2+y^2 = 4$, $y > 0$, by a combination of $z \to z+l$ and $z \to kz$.

Published on 27 Mar 2026 - 5:41

258

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Generating Pythagorean Triples from Others via Dissections

Published on 26 Mar 2026 - 7:57

159

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Calculate x if CD is a diameter of the circle

Published on 29 May 2014 - 16:24

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What is the length of GH?

Published on 31 May 2014 - 5:20

407

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Expected area of an inscribed triangle in a sphere

Published on 18 Mar 2026 - 10:14

112

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Applications of the identity $ab + \left(\frac{a+b}{2} - b\right)^2 = \left(\frac{a+b}{2}\right)^2$

Published on 30 Mar 2026 - 16:45

1.8k

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The composition of two different glide reflections is a rotation

Published on 25 Mar 2026 - 8:07

1.6k

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What does it mean to call horizontal lines through O the "points at infinity" in real projective plane $RP^2$?

Published on 27 Mar 2026 - 3:41

94

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Plane geometry.

Published on 31 Mar 2026 - 10:10

List Question

How to prove this Gram determinant

Find Circle from Tangent Line and Two Points

What do you call a projection of a hyperplane into a finite hypercube that keeps paraxial lines straight?

Euclidean geometry and irrational numbers.

Is there relations between earth mover's distance and vector norms?

Regular polygons constructed inside regular polygons

Show how to map the semicircle $x^2 +y^2 = 1$, $y > 0$, onto $(x−1)^2+y^2 = 4$, $y > 0$, by a combination of $z \to z+l$ and $z \to kz$.

Generating Pythagorean Triples from Others via Dissections

Calculate x if CD is a diameter of the circle

What is the length of GH?

Expected area of an inscribed triangle in a sphere

Applications of the identity $ab + \left(\frac{a+b}{2} - b\right)^2 = \left(\frac{a+b}{2}\right)^2$

The composition of two different glide reflections is a rotation

What does it mean to call horizontal lines through O the "points at infinity" in real projective plane $RP^2$?

Plane geometry.

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