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Month: December 2020

2×2 RC Sequence Dec 2020

  • khoitsma
  • Concept, General
  • 0 Comments

2×2 Rubik’s Cube

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Transmission Tower Details Dec 2020

  • khoitsma
  • Steel Detail
  • 0 Comments

I observed a few details of my neighborhood transmission tower.

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Wondering about the History of Horseshoes Dec 2020

  • khoitsma
  • General, Hardware, History
  • 0 Comments
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Best of Seven Outcome Probability Dec 2020

  • khoitsma
  • General, Kids (middle school and up), Plotly, Probability/Statistics, Python
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There must be 70 ways to … win the playoff.

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From Punch Cards to Flash Memory Dec 2020

  • khoitsma
  • Concept, Hardware, History
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D Day Paratroopers June 1944

  • khoitsma
  • History, Personal
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Images dedicated to Arnold Lee Eddins (Nancy’s father)

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Short Takes
My Dash apps

My GeoGebra app
What is the most general equation for the area of a triangle?
The Wait calculation
The incessant obsolescence postulate (IOP)
Barnard’s Star and the 'Wait Equation'
IOP counterargument
The amazing arbelos
Surprises found in the arbelos (1954)
Arbelos from Wolfram MathWorld
Circle Theorems
• Circle Theorems Marked
• Circle Theorems — Practice
Two Semicircles
Japanese temple geometry
★ Sister Celine — a beautiful life
★ John Lienhard IV on Ingenuity
★ Charles Stutzenbaker, Field Biologist
Neal Stephenson on the OS
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Pentagonal number visual proof

Bayes theorem visual proof

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