Question

How is this circle inversion formula calculated?

score 1.8k · Answer 1 · 2026-02-23 04:35:09

1.8k

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How is this circle inversion formula calculated?

Published on 23 Feb 2026 - 4:35

score 492 · Answer 2 · 2026-04-17 11:57:54

492

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Prove that the length of the common chord is $\frac{2ab\sin \theta}{\sqrt{a^2+b^2+2ab\cos \theta}}$

Published on 17 Apr 2026 - 11:57

score 117 · Answer 3 · 2026-04-15 19:56:59

117

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Prove that $\frac{1}{r_1}-\frac{1}{r_2}=\frac{2}{a}+\frac{2}{b}+\frac{2}{c}$

Published on 15 Apr 2026 - 19:56

score 6.1k · Answer 4 · 2026-04-21 12:29:09

6.1k

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A Part of a semicircle between the two legs of a right angle triangle

Published on 21 Apr 2026 - 12:29

score 58 · Answer 5 · 2026-04-11 20:49:44

58

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Simple question about circles.

Published on 11 Apr 2026 - 20:49

score 600 · Answer 6 · 2026-04-14 09:42:59

600

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Let $ABC$ be an acute angled scalene triangle.

Published on 14 Apr 2026 - 9:42

score 1.3k · Answer 7 · 2026-04-16 04:32:12

1.3k

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Arranging circles around a circle

Published on 16 Apr 2026 - 4:32

score 137 · Answer 8 · 2026-04-14 21:10:21

137

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How many discs necessary to cover a big circle?

Published on 14 Apr 2026 - 21:10

score 175 · Answer 9 · 2026-04-13 23:06:20

175

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Surface area of circle extracted from a tube wall

Published on 13 Apr 2026 - 23:06

score 242 · Answer 10 · 2026-04-08 17:45:56

242

Views

Two circle intersection: help on understanding a specific explanation

Published on 08 Apr 2026 - 17:45

score 72 · Answer 11 · 2026-04-13 17:02:42

72

Views

Finding all intersecting circles of one circle.

Published on 13 Apr 2026 - 17:02

score 1.2k · Answer 12 · 2026-05-11 04:11:29

1.2k

Views

Maximum number of equilateral triangles in a circle

Published on 11 May 2026 - 4:11

score 186 · Answer 13 · 2026-04-10 07:23:14

186

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Geometry question, prove that $\angle APB = \frac12 (\angle AMB + \angle CMD)$

Published on 10 Apr 2026 - 7:23

score 127 · Answer 14 · 2026-05-06 04:14:35

127

Views

Independence of the perimeter of a triangle and an angle formed with respect to lines tangent to a circle

Published on 06 May 2026 - 4:14

score 1.2k · Answer 15 · 2026-04-11 15:35:35

1.2k

Views

Show that a polar equation describes a circle

Published on 11 Apr 2026 - 15:35

List Question

How is this circle inversion formula calculated?

Prove that the length of the common chord is $\frac{2ab\sin \theta}{\sqrt{a^2+b^2+2ab\cos \theta}}$

Prove that $\frac{1}{r_1}-\frac{1}{r_2}=\frac{2}{a}+\frac{2}{b}+\frac{2}{c}$

A Part of a semicircle between the two legs of a right angle triangle

Simple question about circles.

Let $ABC$ be an acute angled scalene triangle.

Arranging circles around a circle

How many discs necessary to cover a big circle?

Surface area of circle extracted from a tube wall

Two circle intersection: help on understanding a specific explanation

Finding all intersecting circles of one circle.

Maximum number of equilateral triangles in a circle

Geometry question, prove that $\angle APB = \frac12 (\angle AMB + \angle CMD)$

Independence of the perimeter of a triangle and an angle formed with respect to lines tangent to a circle

Show that a polar equation describes a circle

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