List questions from plane-geometry

Published on 12 Jun 2018 - 9:45

598

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Homeomorphism of the circle not conjugated to a rational rotation

Published on 12 Jun 2018 - 10:14

357

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What's the need for Hilbert's 7th axiom of incidence?

Published on 19 Mar 2026 - 21:38

40

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Find smooth curve in plane passing through $(1,0)$ s.t. for $(a,b)$ on curve, tangent line to curve at $(a,b)$ intersects $y$-axis at point $(0,a)$.

Published on 26 Mar 2026 - 6:32

43

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How to represent orientation of planes most intuitively

Published on 25 Mar 2026 - 13:04

78

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Geometry Question: finding lengths in a triangle

Published on 26 Mar 2026 - 9:36

484

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Intersection spheroid -plane

Published on 25 Mar 2026 - 1:24

39

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Points and a tangent plane

Published on 19 Jun 2018 - 12:55

686

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How Hilbert's axioms of incidence ensure the existence of a space?

Published on 19 Mar 2026 - 20:20

132

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in traingle ABC, D lies on BC. If $\angle$ DAC = 3 $\angle$ ACD and $\angle$ ADC = 2 $\angle$ ACD, show that AB+AD=BC .

Published on 26 Jun 2018 - 8:29

144

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Isometry of affine space that conserves the area of triangles

Published on 25 Mar 2026 - 13:57

1.5k

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Name and number of "equilateral tessellations with same angles on all vertexes"

Published on 22 Mar 2026 - 9:27

636

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Find the equation of a circle given two tangent lines, and a line passing through center

Published on 25 Mar 2026 - 11:16

78

Views

Prove that a certain set is a halfplane.

Published on 02 Jul 2018 - 7:26

116

Views

Is there a proof of this question through Napoleon's theorem?

Published on 02 Jul 2018 - 21:15

List Question

Transformation of two non parallel lines

Homeomorphism of the circle not conjugated to a rational rotation

What's the need for Hilbert's 7th axiom of incidence?

Find smooth curve in plane passing through $(1,0)$ s.t. for $(a,b)$ on curve, tangent line to curve at $(a,b)$ intersects $y$-axis at point $(0,a)$.

How to represent orientation of planes most intuitively

Geometry Question: finding lengths in a triangle

Intersection spheroid -plane

Points and a tangent plane

How Hilbert's axioms of incidence ensure the existence of a space?

in traingle ABC, D lies on BC. If $\angle$ DAC = 3 $\angle$ ACD and $\angle$ ADC = 2 $\angle$ ACD, show that AB+AD=BC .

Isometry of affine space that conserves the area of triangles

Name and number of "equilateral tessellations with same angles on all vertexes"

Find the equation of a circle given two tangent lines, and a line passing through center

Prove that a certain set is a halfplane.

Is there a proof of this question through Napoleon's theorem?

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