Question

Tangents from a point to two given circles that form equal angles with a line passing through that point

score 75 · Answer 1 · 2023-07-07 08:29:13

75

Views

Tangents from a point to two given circles that form equal angles with a line passing through that point

Published on 07 Jul 2023 - 8:29

score 72 · Answer 2 · 2023-07-12 13:56:39

72

Views

Straightedge and compass constructions and absolute geometry

Published on 12 Jul 2023 - 13:56

score 39 · Answer 3 · 2026-02-23 01:05:30

39

Views

How to draw a ellipse which passes two given points and is tangent to two given line?

Published on 23 Feb 2026 - 1:05

score 47 · Answer 4 · 2023-07-17 17:24:19

47

Views

Constructing a Circular Sector Between Two Concentric Circles with Specific Tangent and Perpendicular Condition

Published on 17 Jul 2023 - 17:24

score 179 · Answer 5 · 2026-02-23 02:40:11

179

Views

Construction of a circle orthogonal to two given circles and tangential to a given line

Published on 23 Feb 2026 - 2:40

score 270 · Answer 6 · 2023-08-05 05:49:20

270

Views

Using a compass of fixed opening and straightedge, what is the shortest way to find the centroid of $10$ points?

Published on 05 Aug 2023 - 5:49

score 121 · Answer 7 · 2023-08-08 15:53:38

121

Views

Is it possible to construct a precise regular pentagon with just a straightedge (no compass)? If yes, then how?

Published on 08 Aug 2023 - 15:53

score 118 · Answer 8 · 2023-08-11 17:04:52

118

Views

Appolonius problem: the PPL case

Published on 11 Aug 2023 - 17:04

score 45 · Answer 9 · 2023-08-13 23:47:04

45

Views

Is there a good resource for constructions using double-edged straightedge?

Published on 13 Aug 2023 - 23:47

score 74 · Answer 10 · 2023-08-25 13:10:14

74

Views

Can a triangle be constructed by right edge and compass when its base, median to the base and the sum of other sides are known?

Published on 25 Aug 2023 - 13:10

score 529 · Answer 11 · 2023-08-29 17:51:03

529

Views

Unexpected tangency

Published on 29 Aug 2023 - 17:51

score 1k · Answer 12 · 2023-09-19 21:37:18

1k

Views

Group formed on Parabola similarly to how an Elliptic curve forms a group (by drawing lines, circles, intersecting, or taking tangent lines)

Published on 19 Sep 2023 - 21:37

score 24 · Answer 13 · 2023-10-02 00:08:32

24

Views

Construction of normals to parabola across external point

Published on 02 Oct 2023 - 0:08

score 43 · Answer 14 · 2023-10-06 06:28:45

43

Views

Rhomboid construction by compass and straight-edge

Published on 06 Oct 2023 - 6:28

score 232 · Answer 15 · 2026-02-23 06:22:23

232

Views

Nondegenerate triangle of zero area. How is it possible?

Published on 23 Feb 2026 - 6:22

List Question

Tangents from a point to two given circles that form equal angles with a line passing through that point

Straightedge and compass constructions and absolute geometry

How to draw a ellipse which passes two given points and is tangent to two given line?

Constructing a Circular Sector Between Two Concentric Circles with Specific Tangent and Perpendicular Condition

Construction of a circle orthogonal to two given circles and tangential to a given line

Using a compass of fixed opening and straightedge, what is the shortest way to find the centroid of $10$ points?

Is it possible to construct a precise regular pentagon with just a straightedge (no compass)? If yes, then how?

Appolonius problem: the PPL case

Is there a good resource for constructions using double-edged straightedge?

Can a triangle be constructed by right edge and compass when its base, median to the base and the sum of other sides are known?

Unexpected tangency

Group formed on Parabola similarly to how an Elliptic curve forms a group (by drawing lines, circles, intersecting, or taking tangent lines)

Construction of normals to parabola across external point

Rhomboid construction by compass and straight-edge

Nondegenerate triangle of zero area. How is it possible?

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