Question

A line cutting an ellipse in two points, finding the equation of ellipse

score 260 · Answer 1 · 2026-03-30 20:48:31

260

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A line cutting an ellipse in two points, finding the equation of ellipse

Published on 30 Mar 2026 - 20:48

score 230 · Answer 2 · 2020-07-06 03:25:48

230

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Geometry solution involving complex numbers from USAMO

Published on 06 Jul 2020 - 3:25

score 108 · Answer 3 · 2020-07-06 13:43:12

108

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In 3D find a point on plane with given plane angle, distance and three other points

Published on 06 Jul 2020 - 13:43

score 43 · Answer 4 · 2026-02-23 04:59:34

43

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Using the rule stated below, is there a way I can plant trees on a 2D plane such that there are no trees in the first k diagonals?

Published on 23 Feb 2026 - 4:59

score 1.1k · Answer 5 · 2020-07-06 22:14:14

1.1k

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Proofs of the Reflection Rules

Published on 06 Jul 2020 - 22:14

score 167 · Answer 6 · 2020-07-07 01:45:24

167

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Line that passes through the Centroid of the ABC triangle and the sectioned areas. (ratio of the triangle areas: $2≤r≤2.25$)

Published on 07 Jul 2020 - 1:45

score 1.6k · Answer 7 · 2020-07-08 02:50:42

1.6k

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Proof of Rotation Rule for a $90^\circ$ Rotation About the Origin

Published on 08 Jul 2020 - 2:50

score 78 · Answer 8 · 2020-07-08 03:23:57

78

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Proving that the locus of the image of $(2, 3)$ in the line $2x-3y+4+k(x-2y+3) =0$ is a circle of radius $\sqrt2$.

Published on 08 Jul 2020 - 3:23

score 234 · Answer 9 · 2026-03-25 06:01:31

234

Views

Proof of Menelaus' theorem using barycentric coordinate

Published on 25 Mar 2026 - 6:01

score 95 · Answer 10 · 2020-07-10 03:04:37

95

Views

plane perpendicular to the straight line

Published on 10 Jul 2020 - 3:04

score 30 · Answer 11 · 2026-03-28 01:47:35

30

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Question about alternative interior angles

Published on 28 Mar 2026 - 1:47

score 877 · Answer 12 · 2020-07-10 05:32:08

877

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Finding the equation of an hyperbola if the distance between its directrices is $\frac83$ and its eccentricity is $\frac32$

Published on 10 Jul 2020 - 5:32

score 526 · Answer 13 · 2026-03-25 20:40:20

526

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Reverse triangulation

Published on 25 Mar 2026 - 20:40

score 2.1k · Answer 14 · 2020-07-10 09:59:42

2.1k

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question about similar triangle word problem

Published on 10 Jul 2020 - 9:59

score 374 · Answer 15 · 2020-07-12 09:31:41

374

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Area of specific region inside a circle i

Published on 12 Jul 2020 - 9:31

List Question

A line cutting an ellipse in two points, finding the equation of ellipse

Geometry solution involving complex numbers from USAMO

In 3D find a point on plane with given plane angle, distance and three other points

Using the rule stated below, is there a way I can plant trees on a 2D plane such that there are no trees in the first k diagonals?

Proofs of the Reflection Rules

Line that passes through the Centroid of the ABC triangle and the sectioned areas. (ratio of the triangle areas: $2≤r≤2.25$)

Proof of Rotation Rule for a $90^\circ$ Rotation About the Origin

Proving that the locus of the image of $(2, 3)$ in the line $2x-3y+4+k(x-2y+3) =0$ is a circle of radius $\sqrt2$.

Proof of Menelaus' theorem using barycentric coordinate

plane perpendicular to the straight line

Question about alternative interior angles

Finding the equation of an hyperbola if the distance between its directrices is $\frac83$ and its eccentricity is $\frac32$

Reverse triangulation

question about similar triangle word problem

Area of specific region inside a circle i

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