Question

Impossible Geometry, I think that the case is not possible, but I might be wrong.

score 62 · Answer 1 · 2020-03-10 11:02:51

62

Views

Impossible Geometry, I think that the case is not possible, but I might be wrong.

Published on 10 Mar 2020 - 11:02

score 110 · Answer 2 · 2026-04-04 05:24:00

110

Views

A geometric ordering problem

Published on 04 Apr 2026 - 5:24

score 336 · Answer 3 · 2020-03-10 18:55:34

336

Views

Integer lattice points in a Hyper sphere : Explanation needed

Published on 10 Mar 2020 - 18:55

score 83 · Answer 4 · 2026-04-04 02:47:32

83

Views

Find angle of isosceles triangle

Published on 04 Apr 2026 - 2:47

score 355 · Answer 5 · 2026-03-25 22:02:47

355

Views

Dependance of an SO(3) invariant function

Published on 25 Mar 2026 - 22:02

score 123 · Answer 6 · 2026-03-26 17:34:52

123

Views

A fundamental question about relations between axioms

Published on 26 Mar 2026 - 17:34

score 78 · Answer 7 · 2026-03-25 23:11:05

78

Views

Circumcircle of a square and an arbitrary point inside it; prove: $|A_1B_1|\cdot|C_1D_1|=|A_1D_1|\cdot|B_1C_1|$

Published on 25 Mar 2026 - 23:11

score 81 · Answer 8 · 2026-03-25 23:08:33

81

Views

Prove that $FG$ is tangent to a fixed circle.

Published on 25 Mar 2026 - 23:08

score 615 · Answer 9 · 2026-03-26 14:22:42

615

Views

Constructing the center of a circle, straightedge only. Variants on the Poncelet-Steiner Theorem

Published on 26 Mar 2026 - 14:22

score 93 · Answer 10 · 2026-03-25 23:11:14

93

Views

Prove the orthogonal projections of $S$ form a tangent quadrilateral

Published on 25 Mar 2026 - 23:11

score 89 · Answer 11 · 2026-04-04 02:49:18

89

Views

Prove that in acute triangle : $\sin A\cos (B-C)=\frac{\sin (2B)+\sin (2C)}{2}$

Published on 04 Apr 2026 - 2:49

score 230 · Answer 12 · 2020-03-17 20:50:25

230

Views

Why is Proposition 29 in Book I of Euclid‘s Elements dependent on the Parallel Postulate?

Published on 17 Mar 2020 - 20:50

score 84 · Answer 13 · 2020-03-17 23:13:48

84

Views

How can I find the length of a segment formed by the shadow of a ladder?

Published on 17 Mar 2020 - 23:13

score 106 · Answer 14 · 2020-03-17 23:18:45

106

Views

How can I find the magnitude of a vector which is the same as the area of a parallelogram?

Published on 17 Mar 2020 - 23:18

score 82 · Answer 15 · 2020-03-18 00:01:44

how to proof that a segment line between a point inside a circle and a point outsite a circle has a point in common with the circle

List Question

Impossible Geometry, I think that the case is not possible, but I might be wrong.

A geometric ordering problem

Integer lattice points in a Hyper sphere : Explanation needed

Find angle of isosceles triangle

Dependance of an SO(3) invariant function

A fundamental question about relations between axioms

Circumcircle of a square and an arbitrary point inside it; prove: $|A_1B_1|\cdot|C_1D_1|=|A_1D_1|\cdot|B_1C_1|$

Prove that $FG$ is tangent to a fixed circle.

Constructing the center of a circle, straightedge only. Variants on the Poncelet-Steiner Theorem

Prove the orthogonal projections of $S$ form a tangent quadrilateral

Prove that in acute triangle : $\sin A\cos (B-C)=\frac{\sin (2B)+\sin (2C)}{2}$

Why is Proposition 29 in Book I of Euclid‘s Elements dependent on the Parallel Postulate?

How can I find the length of a segment formed by the shadow of a ladder?

How can I find the magnitude of a vector which is the same as the area of a parallelogram?

how to proof that a segment line between a point inside a circle and a point outsite a circle has a point in common with the circle

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