Question

If $\sin A+\sin B+\sin C=\cos A+\cos B+\cos C=0$,

score 6.1k · Answer 1 · 2026-04-17 00:07:12

6.1k

Views

If $\sin A+\sin B+\sin C=\cos A+\cos B+\cos C=0$,

Published on 17 Apr 2026 - 0:07

score 59 · Answer 2 · 2026-04-14 05:52:45

59

Views

Let D denote a point on base AB, and let E denote a point on leg BC of an isosceles triangle ABC.

Published on 14 Apr 2026 - 5:52

score 60 · Answer 3 · 2026-04-14 00:57:21

60

Views

Metric Spaces Whose Diameter is Achieved at Every Point.

Published on 14 Apr 2026 - 0:57

score 1.3k · Answer 4 · 2026-04-26 14:36:17

1.3k

Views

Prove that if the altitude and median of a triangle form equal angles with sides then the triangle is right.

Published on 26 Apr 2026 - 14:36

score 255 · Answer 5 · 2026-03-28 17:05:38

255

Views

construct triangle given $b-c$, $r$ and $h_{b}$

Published on 28 Mar 2026 - 17:05

score 837 · Answer 6 · 2026-04-12 14:39:13

837

Views

Geometric interpretation of Leibniz formula for $\pi$

Published on 12 Apr 2026 - 14:39

score 1.3k · Answer 7 · 2026-04-04 02:30:39

1.3k

Views

Geometric proof for irrationality of $\pi$

Published on 04 Apr 2026 - 2:30

score 240 · Answer 8 · 2026-04-16 10:25:45

240

Views

Equivalent norms on the Euclidean space $\mathbb{R}^{n}$

Published on 16 Apr 2026 - 10:25

score 52 · Answer 9 · 2026-04-17 14:47:16

52

Views

Show that $\lvert x-x_1\rvert=c\cdot\lvert x-x_2\rvert$ describes an $n-1$ sphere for $0<c<1$ and a hyperplane for $c=1$

Published on 17 Apr 2026 - 14:47

score 244 · Answer 10 · 2026-04-15 14:32:37

244

Views

Median points collinear: At least one outside triangle

Published on 15 Apr 2026 - 14:32

score 201 · Answer 11 · 2026-04-14 15:29:54

201

Views

Proving angles are supplementary in isosceles triangle

Published on 14 Apr 2026 - 15:29

score 209 · Answer 12 · 2026-04-26 14:32:27

209

Views

Maximize distance to closest vertex inside triangle

Published on 26 Apr 2026 - 14:32

score 272 · Answer 13 · 2026-04-15 09:03:54

272

Views

How to prove that a collection of epsilon balls generates a basis for topology?

Published on 15 Apr 2026 - 9:03

score 691 · Answer 14 · 2026-03-26 07:55:16

691

Views

Is this really an open problem? Maximizing angle between $n$ vectors

Published on 26 Mar 2026 - 7:55

score 75 · Answer 15 · 2026-04-11 10:58:00

75

Views

Bounds on the angles between four unit-length vectors in three dimensional Euclidean space

Published on 11 Apr 2026 - 10:58

List Question

If $\sin A+\sin B+\sin C=\cos A+\cos B+\cos C=0$,

Let D denote a point on base AB, and let E denote a point on leg BC of an isosceles triangle ABC.

Metric Spaces Whose Diameter is Achieved at Every Point.

Prove that if the altitude and median of a triangle form equal angles with sides then the triangle is right.

construct triangle given $b-c$, $r$ and $h_{b}$

Geometric interpretation of Leibniz formula for $\pi$

Geometric proof for irrationality of $\pi$

Equivalent norms on the Euclidean space $\mathbb{R}^{n}$

Show that $\lvert x-x_1\rvert=c\cdot\lvert x-x_2\rvert$ describes an $n-1$ sphere for $0<c<1$ and a hyperplane for $c=1$

Median points collinear: At least one outside triangle

Proving angles are supplementary in isosceles triangle

Maximize distance to closest vertex inside triangle

How to prove that a collection of epsilon balls generates a basis for topology?

Is this really an open problem? Maximizing angle between $n$ vectors

Bounds on the angles between four unit-length vectors in three dimensional Euclidean space

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