Question

Show that $\frac{(m_a)^4+(m_b)^4+(m_c)^4}{a^4+b^4+c^4} = \frac{9}{16}$

score 107 · Answer 1 · 2026-04-02 05:39:59

107

Views

Show that $\frac{(m_a)^4+(m_b)^4+(m_c)^4}{a^4+b^4+c^4} = \frac{9}{16}$

Published on 02 Apr 2026 - 5:39

score 273 · Answer 2 · 2026-03-26 07:58:56

273

Views

Structure of inflation/deflation on Penrose Tilings?

Published on 26 Mar 2026 - 7:58

score 60 · Answer 3 · 2019-11-29 05:15:58

60

Views

Reversing a projection to get a 90-deg angle

Published on 29 Nov 2019 - 5:15

score 80 · Answer 4 · 2019-11-29 17:46:54

80

Views

Proof for a quadrilateral $ABCD$ inscribed in a circle: $AB\cdot CD + AD\cdot BC = AC\cdot BD$

Published on 29 Nov 2019 - 17:46

score 117 · Answer 5 · 2026-02-23 13:47:46

117

Views

Using another congruence criterion as axiom in Hilbert's axiomatic geometry

Published on 23 Feb 2026 - 13:47

score 595 · Answer 6 · 2019-11-30 13:09:22

595

Views

Finding the distance to a Hexagon

Published on 30 Nov 2019 - 13:09

score 51 · Answer 7 · 2026-03-28 05:22:37

51

Views

Help on how to find an equation of a plane passing through a line and a point.

Published on 28 Mar 2026 - 5:22

score 136 · Answer 8 · 2019-12-01 03:14:14

136

Views

How To Prove Pappus's Hexagon Theorem using the triangle $\bigtriangleup{XYZ}$

Published on 01 Dec 2019 - 3:14

score 130 · Answer 9 · 2026-03-26 08:23:06

130

Views

Prove that $\frac{1}{q}+\frac{1}{p}>\frac{1}{r}$ when you know that:

Published on 26 Mar 2026 - 8:23

score 119 · Answer 10 · 2026-03-26 01:13:33

119

Views

A problem about equilateral triangle

Published on 26 Mar 2026 - 1:13

score 65 · Answer 11 · 2019-12-02 04:54:43

Cube $ABCD-EFGH$. If $P$ midpoint of $HG$, $Q$ midpoint of $FG$, $R$ midpoint of $PQ$, $BS$ is projection $BR$ to $ABCD$, length of $BS$?

score 192 · Answer 12 · 2019-12-04 15:18:36

192

Views

Using Dedekind axiom of continuity to proof the circular continuity principle

Published on 04 Dec 2019 - 15:18

score 309 · Answer 13 · 2026-03-28 05:22:25

309

Views

Prove two line segments are perpendicular to each other in a triangle with orthocenter

Published on 28 Mar 2026 - 5:22

score 238 · Answer 14 · 2019-12-06 12:20:49

238

Views

A triangle's sides are integers, and its circumradius is a prime number. Prove that the triangle is right-angled.

Published on 06 Dec 2019 - 12:20

score 230 · Answer 15 · 2019-12-06 13:50:24

230

Views

Prove triangle with integer sides, area, inradius and circumradius has even sides and P divisible by 4

Published on 06 Dec 2019 - 13:50

List Question

Show that $\frac{(m_a)^4+(m_b)^4+(m_c)^4}{a^4+b^4+c^4} = \frac{9}{16}$

Structure of inflation/deflation on Penrose Tilings?

Reversing a projection to get a 90-deg angle

Proof for a quadrilateral $ABCD$ inscribed in a circle: $AB\cdot CD + AD\cdot BC = AC\cdot BD$

Using another congruence criterion as axiom in Hilbert's axiomatic geometry

Finding the distance to a Hexagon

Help on how to find an equation of a plane passing through a line and a point.

How To Prove Pappus's Hexagon Theorem using the triangle $\bigtriangleup{XYZ}$

Prove that $\frac{1}{q}+\frac{1}{p}>\frac{1}{r}$ when you know that:

A problem about equilateral triangle

Cube $ABCD-EFGH$. If $P$ midpoint of $HG$, $Q$ midpoint of $FG$, $R$ midpoint of $PQ$, $BS$ is projection $BR$ to $ABCD$, length of $BS$?

Using Dedekind axiom of continuity to proof the circular continuity principle

Prove two line segments are perpendicular to each other in a triangle with orthocenter

A triangle's sides are integers, and its circumradius is a prime number. Prove that the triangle is right-angled.

Prove triangle with integer sides, area, inradius and circumradius has even sides and P divisible by 4

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