Question

The area of a triangle in $\mathbb{R}^3$ is $\sqrt{S_1^2+S_2^2+S_3^2}$, where each $S_i$ is the area of a projection onto a coordinate plane

score 68 · Answer 1 · 2018-05-17 12:41:28

The area of a triangle in $\mathbb{R}^3$ is $\sqrt{S_1^2+S_2^2+S_3^2}$, where each $S_i$ is the area of a projection onto a coordinate plane

score 246 · Answer 2 · 2026-03-25 08:04:53

246

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Locus of points whose distance between two 3D lines is at a given ratio

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score 236 · Answer 3 · 2026-03-25 07:42:22

236

Views

Volume of cannoli

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score 1.4k · Answer 4 · 2026-03-25 15:59:15

1.4k

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Sphere inscribed in Regular Tetrahedron

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score 140 · Answer 5 · 2018-05-23 14:08:39

140

Views

Find right triangle vertex by 2 vertex, hypotenuse and angles

Published on 23 May 2018 - 14:08

score 385 · Answer 6 · 2026-03-25 00:23:15

385

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Published on 25 Mar 2026 - 0:23

score 117 · Answer 7 · 2018-05-26 07:25:15

117

Views

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Published on 26 May 2018 - 7:25

score 805 · Answer 8 · 2026-03-25 20:35:26

805

Views

find intermediate points on small circle of a sphere

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score 482 · Answer 9 · 2018-06-02 16:02:14

482

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How to find the coordinates of tangency of an external point to a sphere?

Published on 02 Jun 2018 - 16:02

score 644 · Answer 10 · 2026-03-25 23:39:24

644

Views

Intersection of tangent Plane of a sphere and a line in 3D vector space.

Published on 25 Mar 2026 - 23:39

score 26 · Answer 11 · 2026-03-26 04:30:58

26

Views

Maximum number of sides when cutting n sided polyhedron

Published on 26 Mar 2026 - 4:30

score 3.1k · Answer 12 · 2026-03-26 01:00:13

3.1k

Views

Tangent to a sphere

Published on 26 Mar 2026 - 1:00

score 34 · Answer 13 · 2026-03-25 22:02:35

34

Views

Deduce that the intersection of two graphs is a vertical circle

Published on 25 Mar 2026 - 22:02

score 949 · Answer 14 · 2026-03-25 23:42:30

949

Views

Given a sphere and an external point, find the equation of all the tangent planes to the sphere passing through the given point.

Published on 25 Mar 2026 - 23:42

score 52 · Answer 15 · 2018-06-06 11:43:33

52

Views

Find the vector point equation

Published on 06 Jun 2018 - 11:43

List Question

The area of a triangle in $\mathbb{R}^3$ is $\sqrt{S_1^2+S_2^2+S_3^2}$, where each $S_i$ is the area of a projection onto a coordinate plane

Locus of points whose distance between two 3D lines is at a given ratio

Volume of cannoli

Sphere inscribed in Regular Tetrahedron

Find right triangle vertex by 2 vertex, hypotenuse and angles

Mean distance between 2 points in adjacent voxels (cubes)

Vector transformation for a general rotation

find intermediate points on small circle of a sphere

How to find the coordinates of tangency of an external point to a sphere?

Intersection of tangent Plane of a sphere and a line in 3D vector space.

Maximum number of sides when cutting n sided polyhedron

Tangent to a sphere

Deduce that the intersection of two graphs is a vertical circle

Given a sphere and an external point, find the equation of all the tangent planes to the sphere passing through the given point.

Find the vector point equation

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