List questions from euclidean-geometry

Published on 01 Apr 2019 - 13:15

99

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Prove that $IP \perp CQ$.

Published on 01 Apr 2019 - 16:48

131

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Stereographic Projection and the cotangent

Published on 28 Mar 2026 - 10:34

52

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Vector identity in $\mathbb{R}^2$

Published on 02 Apr 2019 - 11:39

221

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Eccentricity going to zero -- Geometric definition conic

Published on 27 Mar 2026 - 13:20

50

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Proof that the triangle formed by mass centers is equilateral.

Published on 23 Feb 2026 - 2:56

363

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Orthonormal basis containing a given vector

Published on 27 Mar 2026 - 1:13

66

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Decompose Euclidean norm into angle and difference in length

Published on 03 Apr 2019 - 16:40

212

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(KiselevB1-254) Compare secant lines through the intersection of two circles

Published on 03 Apr 2019 - 19:03

768

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Compare euclidean distances from different dimensions

Published on 25 Mar 2026 - 18:45

105

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Nice way of showing the locus of $\left|z-\frac{1}{z}\right| = 2$ is the union of 2 intersecting circles.

Published on 03 Apr 2019 - 22:18

109

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How to prove the general equation of a line using linear algebra?

Published on 03 Apr 2019 - 23:18

69

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Are weaves stable in higher dimensions?

Published on 27 Mar 2026 - 7:00

96

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Why is $x^2+y^2=r^2$ a $1$-sphere and not a $2$-sphere?

Published on 04 Apr 2019 - 8:58

45

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Solving perpendicularity problem not using scalar product of vector

Published on 04 Apr 2019 - 9:48

List Question

Interpreting a problem in combinatorial geometry

Prove that $IP \perp CQ$.

Stereographic Projection and the cotangent

Vector identity in $\mathbb{R}^2$

Eccentricity going to zero -- Geometric definition conic

Proof that the triangle formed by mass centers is equilateral.

Orthonormal basis containing a given vector

Decompose Euclidean norm into angle and difference in length

(KiselevB1-254) Compare secant lines through the intersection of two circles

Compare euclidean distances from different dimensions

Nice way of showing the locus of $\left|z-\frac{1}{z}\right| = 2$ is the union of 2 intersecting circles.

How to prove the general equation of a line using linear algebra?

Are weaves stable in higher dimensions?

Why is $x^2+y^2=r^2$ a $1$-sphere and not a $2$-sphere?

Solving perpendicularity problem not using scalar product of vector

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