Question

Are there prerequisites to "Geometry: Euclid and Beyond" By Robin Hartshorne?

score 484 · Answer 1 · 2026-04-10 06:17:21

Are there prerequisites to "Geometry: Euclid and Beyond" By Robin Hartshorne?

Published on 10 Apr 2026 - 6:17

score 307 · Answer 2 · 2026-04-11 19:25:53

Find two points on two lines in the plane where the line between the two points go through a third point and are equidistant from that point

score 79 · Answer 3 · 2026-04-14 01:00:50

79

Views

Diagonal of triangular bipyramid with 3 edges next to a point length 1 and orthogonal, and the lengths of three known.

Published on 14 Apr 2026 - 1:00

score 83 · Answer 4 · 2026-04-11 22:10:49

83

Views

Two lines intersect forming four angles

Published on 11 Apr 2026 - 22:10

score 1k · Answer 5 · 2026-04-16 21:56:38

1k

Views

Construct a regular pentagon in only 11 steps using ruler and compass.

Published on 16 Apr 2026 - 21:56

score 78 · Answer 6 · 2026-04-12 14:37:21

78

Views

Shortest path to find a highway

Published on 12 Apr 2026 - 14:37

score 153 · Answer 7 · 2026-04-16 21:19:26

153

Views

Geometric proof for $|| u ||^2 + || v ||^2 = \frac{1}{2}||u-v||^2 + 2||\frac{u+v}{2}||^2$

Published on 16 Apr 2026 - 21:19

score 85 · Answer 8 · 2026-04-18 08:15:38

85

Views

An inequality about inner product in $\mathbb{R}^2$.

Published on 18 Apr 2026 - 8:15

score 18.2k · Answer 9 · 2026-04-09 05:46:42

18.2k

Views

Hexagon packing in a circle

Published on 09 Apr 2026 - 5:46

score 1k · Answer 10 · 2026-04-11 16:39:06

1k

Views

How do I get vectors orthogonal to the one generated by the spherical coordinate formula?

Published on 11 Apr 2026 - 16:39

score 92 · Answer 11 · 2026-04-14 10:11:38

92

Views

Given a triangle $ABC$, make it a point $D$ on the side $AB$.

Published on 14 Apr 2026 - 10:11

score 176 · Answer 12 · 2026-04-13 06:05:02

176

Views

On the definition of sphere in analytic geometry...

Published on 13 Apr 2026 - 6:05

score 220 · Answer 13 · 2026-04-13 18:05:27

220

Views

Euclid's elements proposition 17. The sum of two angles in a triangle is less than 180 degres.

Published on 13 Apr 2026 - 18:05

score 508 · Answer 14 · 2026-04-12 23:54:10

508

Views

What is the fraction of volume of unit hypersphere centered at one of the vertices of hypercube to that of hypercube?

Published on 12 Apr 2026 - 23:54

score 268 · Answer 15 · 2026-04-09 06:01:03

268

Views

How to show express $y $ in terms of angle $\theta$?

Published on 09 Apr 2026 - 6:01

List Question

Are there prerequisites to "Geometry: Euclid and Beyond" By Robin Hartshorne?

Find two points on two lines in the plane where the line between the two points go through a third point and are equidistant from that point

Diagonal of triangular bipyramid with 3 edges next to a point length 1 and orthogonal, and the lengths of three known.

Two lines intersect forming four angles

Construct a regular pentagon in only 11 steps using ruler and compass.

Shortest path to find a highway

Geometric proof for $|| u ||^2 + || v ||^2 = \frac{1}{2}||u-v||^2 + 2||\frac{u+v}{2}||^2$

An inequality about inner product in $\mathbb{R}^2$.

Hexagon packing in a circle

How do I get vectors orthogonal to the one generated by the spherical coordinate formula?

Given a triangle $ABC$, make it a point $D$ on the side $AB$.

On the definition of sphere in analytic geometry...

Euclid's elements proposition 17. The sum of two angles in a triangle is less than 180 degres.

What is the fraction of volume of unit hypersphere centered at one of the vertices of hypercube to that of hypercube?

How to show express $y $ in terms of angle $\theta$?

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