Question

Which inversion circle for an extension of shoemaker's knife figure involving 3 families of circles?

score 114 · Answer 1 · 2019-11-11 20:51:17

114

Views

Which inversion circle for an extension of shoemaker's knife figure involving 3 families of circles?

Published on 11 Nov 2019 - 20:51

score 209 · Answer 2 · 2019-11-12 02:21:48

209

Views

ABCDE is a convex pentagon with ABCD a square. F and G are on AB. Prove EAF + EBG = DFG in areas

Published on 12 Nov 2019 - 2:21

score 78 · Answer 3 · 2026-03-26 12:46:54

78

Views

Doubling the cube using the quadratrix of Hippias

Published on 26 Mar 2026 - 12:46

score 291 · Answer 4 · 2026-03-30 10:38:39

291

Views

Elementary proof of Descartes' theorem (4 mutually tangent circles)

Published on 30 Mar 2026 - 10:38

score 206 · Answer 5 · 2019-11-13 20:49:48

206

Views

Bisect an angle whose vertex does not fit the page of the diagram.

Published on 13 Nov 2019 - 20:49

score 50 · Answer 6 · 2026-04-02 23:20:47

50

Views

Find the value of $k$ such that : $S_{ABC}=kS_{RST}$

Published on 02 Apr 2026 - 23:20

score 147 · Answer 7 · 2026-03-29 05:35:04

147

Views

X lies on Polar of T.

Published on 29 Mar 2026 - 5:35

score 176 · Answer 8 · 2019-11-15 17:01:59

176

Views

A difficult Euclidean geometry problem.

Published on 15 Nov 2019 - 17:01

score 579 · Answer 9 · 2026-03-26 06:34:46

579

Views

Find the smallest value of the following expression $\sqrt{(x-9)^2 +4} + \sqrt{x^2+y^2}+ \sqrt{(y-3)^2 +9}$

Published on 26 Mar 2026 - 6:34

score 166 · Answer 10 · 2019-11-15 23:21:45

166

Views

Area triangle (possible)

Published on 15 Nov 2019 - 23:21

score 57 · Answer 11 · 2019-11-16 01:58:36

57

Views

Three circles implies incenter

Published on 16 Nov 2019 - 1:58

score 155 · Answer 12 · 2019-11-16 11:28:29

155

Views

Mansion point and incenter

Published on 16 Nov 2019 - 11:28

score 1.8k · Answer 13 · 2019-11-16 23:06:26

1.8k

Views

Why $\{ \lambda x + (1-\lambda){y}\;\lvert\; \lambda \in [0,1] \}$ represents the line segment between $x,y$?

Published on 16 Nov 2019 - 23:06

score 575 · Answer 14 · 2019-11-17 15:15:26

575

Views

Why does it make no sense to define addition on points in geometry?

Published on 17 Nov 2019 - 15:15

score 73 · Answer 15 · 2026-04-03 00:57:16

73

Views

Prove that : $(BN)//(DM)$

Published on 03 Apr 2026 - 0:57

List Question

Which inversion circle for an extension of shoemaker's knife figure involving 3 families of circles?

ABCDE is a convex pentagon with ABCD a square. F and G are on AB. Prove EAF + EBG = DFG in areas

Doubling the cube using the quadratrix of Hippias

Elementary proof of Descartes' theorem (4 mutually tangent circles)

Bisect an angle whose vertex does not fit the page of the diagram.

Find the value of $k$ such that : $S_{ABC}=kS_{RST}$

X lies on Polar of T.

A difficult Euclidean geometry problem.

Find the smallest value of the following expression $\sqrt{(x-9)^2 +4} + \sqrt{x^2+y^2}+ \sqrt{(y-3)^2 +9}$

Area triangle (possible)

Three circles implies incenter

Mansion point and incenter

Why $\{ \lambda x + (1-\lambda){y}\;\lvert\; \lambda \in [0,1] \}$ represents the line segment between $x,y$?

Why does it make no sense to define addition on points in geometry?

Prove that : $(BN)//(DM)$

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