Multiplication and Division by Similar Triangles

ojs

Author

Learned D3 at Businessweek, started using Observable to do my job at Kensho, took time off to write notebooks about Mayans and Galton, moved to San Francisco to work for Observable. Now work for it remotely from the Berkshires where my wife runs Avaloch.

Comments (6)

Jacob Rus

Dec 24, 2020

You might enjoy https://math.ucr.edu/home//baez/torsors.html

Dec 24, 2020

Also https://www.youtube.com/watch?v=CfW845LNObM

Toph Tucker

Jan 12, 2021

Torsors!! I had never heard of them but it feels like I've wanted that page for years! Also an excellent 3B1B.

Fabian Iwand

Mar 29, 2022

You cannot currently switch between multiplication and division (at least in Chrome), because disabling the fieldsets also disables the contained radios.

Mar 29, 2022

(Also, the number inputs are too narrow - they barely show more than one digit.)

Toph Tucker

Mar 31, 2022

made the inputs just a bit wider! switching between multiplication and division worked fine for me in chrome 99, even with the radio buttons in the legends of the fieldset — but i can imagine how that might be brittle/underspecified behavior lol so i just moved the radio buttons out of the fieldsets.

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Multiplication and Division by Similar Triangles | Toph Tucker | ObservableMultiplication and Division by Similar Triangles | Toph Tucker | Observable