List questions from plane-geometry

Published on 11 Apr 2026 - 19:58

78

Views

Subset of the $(x,y)$ plane satisfying $x^2 - xy + y^2 \le 0$

Published on 16 Apr 2026 - 7:24

57

Views

Combinatorial question on the arrangement of hyperplanes

Published on 10 May 2026 - 18:04

501

Views

Points of tangency from a point M to an ellipsoid-plane intersection

Published on 10 May 2026 - 14:49

138

Views

Congruent chords that subtend incongruent arcs

Published on 14 Apr 2026 - 20:20

189

Views

Spanning tree in the unit square with low diameter and low degree

Published on 12 Apr 2026 - 13:02

80

Views

How to tell which faces of a convex solid are visible.

Published on 17 Apr 2026 - 19:23

2.3k

Views

Specification of 2D plane in 4D space

Published on 13 Apr 2026 - 21:14

127

Views

Finding angles with bisectors

Published on 10 May 2026 - 16:30

65

Views

2D plane characterization for Euclidian space of >1 dimension

Published on 10 May 2026 - 19:20

2.1k

Views

Derive Equation of Plane passing through the intersection of two planes

Published on 12 Apr 2026 - 14:58

305

Views

Prove $\frac{BC}{CA} \cdot \frac{AE}{EF} \cdot \frac{FD}{DB} = 1$ in Convex hexagon

Published on 15 Apr 2026 - 18:03

74

Views

2nd Point of Sector that lies on Circle on a 2D coordinate plane?

Published on 16 Apr 2026 - 22:25

55

Views

Normal plane at a point on the intersecting line

Published on 13 Apr 2026 - 8:47

2.5k

Views

How is $I-vv^T$ the projection onto the orthogonal complement of the line through the origin in the direction $v$?

Published on 10 May 2026 - 17:17

List Question

How to find parameters of 3D plane in new frame of reference?

Subset of the $(x,y)$ plane satisfying $x^2 - xy + y^2 \le 0$

Combinatorial question on the arrangement of hyperplanes

Points of tangency from a point M to an ellipsoid-plane intersection

Congruent chords that subtend incongruent arcs

Spanning tree in the unit square with low diameter and low degree

How to tell which faces of a convex solid are visible.

Specification of 2D plane in 4D space

Finding angles with bisectors

2D plane characterization for Euclidian space of >1 dimension

Derive Equation of Plane passing through the intersection of two planes

Prove $\frac{BC}{CA} \cdot \frac{AE}{EF} \cdot \frac{FD}{DB} = 1$ in Convex hexagon

2nd Point of Sector that lies on Circle on a 2D coordinate plane?

Normal plane at a point on the intersecting line

How is $I-vv^T$ the projection onto the orthogonal complement of the line through the origin in the direction $v$?

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