Question

Does this line preserving, continuous bijection on an equilateral triangle exist?

score 170 · Answer 1 · 2026-05-05 05:18:19

170

Views

Does this line preserving, continuous bijection on an equilateral triangle exist?

Published on 05 May 2026 - 5:18

score 275 · Answer 2 · 2026-04-25 00:09:40

275

Views

Origami: What shapes are impossible?

Published on 25 Apr 2026 - 0:09

score 216 · Answer 3 · 2026-03-28 20:56:54

216

Views

Construct a triangle given certain lengths related to a bisector

Published on 28 Mar 2026 - 20:56

score 815 · Answer 4 · 2026-04-17 09:46:05

815

Views

Distance between two Polar-Coordinates

Published on 17 Apr 2026 - 9:46

score 33 · Answer 5 · 2026-04-14 21:28:32

33

Views

Find $a\in\mathbb{C}$ so that the equation of the line through $−2 + i$ and $−2i$ is $z\bar{a} − a\bar{z} = 8i$

Published on 14 Apr 2026 - 21:28

score 660 · Answer 6 · 2026-04-28 14:09:01

660

Views

Geometry problem in Circumcentre and Incentre

Published on 28 Apr 2026 - 14:09

score 3.7k · Answer 7 · 2026-04-11 10:12:53

3.7k

Views

condition for cones to be reciprocal

Published on 11 Apr 2026 - 10:12

score 680 · Answer 8 · 2026-04-14 11:31:10

680

Views

Moving Line Segment Problem

Published on 14 Apr 2026 - 11:31

score 216 · Answer 9 · 2026-04-14 22:51:00

216

Views

Suppose that $A, B$, and $C$ are distinct points in $C$. Suppose that $l$ is the line which bisects $∠BAC$ and $M$ is the line which bisects $∠ACB$

Published on 14 Apr 2026 - 22:51

score 101 · Answer 10 · 2026-04-16 14:24:35

101

Views

Suppose that $a, b,$ and $c$ are distinct points in $\mathbb{C}$.

Published on 16 Apr 2026 - 14:24

score 38 · Answer 11 · 2026-04-14 05:50:59

38

Views

How do I make an inner rounded rectangle and an outer rounded rectangle be parallel around the corners?

Published on 14 Apr 2026 - 5:50

score 929 · Answer 12 · 2026-04-15 01:36:19

929

Views

Suppose that $ABCD$ is a trapezoid with $AB$ parallel to $CD$.

Published on 15 Apr 2026 - 1:36

score 528 · Answer 13 · 2026-04-15 18:11:22

528

Views

Vector of triangle height constructed over two vectors

Published on 15 Apr 2026 - 18:11

score 83 · Answer 14 · 2026-03-28 20:57:25

83

Views

A straightedge and compass construction: $\left(\widehat{A},r,b-c\right)$

Published on 28 Mar 2026 - 20:57

score 142 · Answer 15 · 2026-03-29 09:09:34

142

Views

Estimating the distance between two coordinates but without using Euclidean distance

Published on 29 Mar 2026 - 9:09

List Question

Does this line preserving, continuous bijection on an equilateral triangle exist?

Origami: What shapes are impossible?

Construct a triangle given certain lengths related to a bisector

Distance between two Polar-Coordinates

Find $a\in\mathbb{C}$ so that the equation of the line through $−2 + i$ and $−2i$ is $z\bar{a} − a\bar{z} = 8i$

Geometry problem in Circumcentre and Incentre

condition for cones to be reciprocal

Moving Line Segment Problem

Suppose that $A, B$, and $C$ are distinct points in $C$. Suppose that $l$ is the line which bisects $∠BAC$ and $M$ is the line which bisects $∠ACB$

Suppose that $a, b,$ and $c$ are distinct points in $\mathbb{C}$.

How do I make an inner rounded rectangle and an outer rounded rectangle be parallel around the corners?

Suppose that $ABCD$ is a trapezoid with $AB$ parallel to $CD$.

Vector of triangle height constructed over two vectors

A straightedge and compass construction: $\left(\widehat{A},r,b-c\right)$

Estimating the distance between two coordinates but without using Euclidean distance

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