Sophia (she/her)
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fractalkitty.com
Sophia (she/her)
@fractalkitty.com
Math-obsessed perpetual asker of why. Random task penguin. Life thoughts are often in haiku. (She/her)
Reposted by Sophia (she/her)
It took me about three months to get here but...

Here's a 🪶 for (nearly) every species of bird, with colors extracted from wikipedia descriptions.

10,151 species.

#dataviz #birds #data
November 7, 2025 at 6:22 PM
A new inquiry activity is posted on Fractal Kitty!

www.fractalkitty.com/inquiries-we...

This one plays with graphs and can be used as an extension to Sim, Don't Make a Triangle, and other such games.

#mtbos #iteachmath #mathplay #accessibleProofs #inquiry #turan #graphTheory #triangles
Inquiries-Week 5: Triangles Emerge
Introduction In this inquiry, nodes are connected one at a time. How many lines can you draw before a triangle emerges? Starting with Four Let's start with four nodes - draw them on a sheet of pap...
www.fractalkitty.com
November 6, 2025 at 7:57 AM
Mathober in this weeks CodePen Spark! It was a really fun month of math doodles.

codepen.io/spark/480

@codepen.io

#mathober #mathober2025
CodePen
codepen.io
November 6, 2025 at 1:49 AM
Once we ran out of candy - which was way faster than expected, I'd say 9 out of 10 trick-or-treaters were elated to have origami paper. The rest were happy with rocks. One group needed to see a noperthedron

There was an occasional fidget toy or math toy coming of the printer that went out as well
November 1, 2025 at 4:32 AM
Reposted by Sophia (she/her)
#mathober Day 31: central. Led me to central dilation which led to #spiral similarity which led to #geogebra... www.geogebra.org/m/wcqcuq3s
Spiral Dilation
Exploring spiral dilations
www.geogebra.org
October 31, 2025 at 4:56 PM
Reposted by Sophia (she/her)
I like to close #mathober with some calaveras to remember those we lost this year from the math community. Chief for me was the amazing Shelli Temple (druinok). www.tumblr.com/mathhombre/7... #mtbos
November 1, 2025 at 12:37 AM
#Mathober code is complete!

On codepen: codepen.io/collection/y...

On OpenProcessing: openprocessing.org/curation/90042

#mathober2025

Thank you Everyone that participated - It was so inspiring to see all of the are, posts, humor and creations.
Mathober2025 - a Collection by Sophia (fractal kitty) (she/her) on CodePen
codepen.io
November 1, 2025 at 4:26 AM
Today's #mathober is Minor.

I used minor arcs:

codepen.io/fractalkitty...

#mathober2025
Minor
...
codepen.io
October 30, 2025 at 10:22 PM
Reposted by Sophia (she/her)
Have you noticed a change of colors? 🍁

You can now define colors in the 3D calculator that depend directly on coordinates. 📝 Learn more in the Desmos Help Center: help.desmos.com/hc/en-us/art... #iteachmath #mathsky
October 28, 2025 at 6:40 PM
Reposted by Sophia (she/her)
I've got one more #mathober post - today's prompt is "recursion", and this by-hand construction of the Spiral of Theodorus seems sort of recursive. Just keep adding triangles over and over. The length of the hypotenuses are the square roots of 2 through 17 […]

[Original post on universeodon.com]
October 28, 2025 at 11:47 PM
Found a bluesy geogebra jam on YouTube for the hexyl triangle today while thinking about #mathober

www.youtube.com/watch?v=Gc9R...
The hexyl triangle The hexyl circle
YouTube video by Razvan Raducanu
www.youtube.com
October 30, 2025 at 1:57 AM
Recursion
...
codepen.io
October 29, 2025 at 4:35 AM
An article on aphantasia: www.newyorker.com/magazine/202...

I often was too told to picture mathematics and it took me a long time to realize that other people actually could.
Some People Can’t See Mental Images. The Consequences Are Profound
Research has linked the ability to visualize to a bewildering variety of human traits—how we experience trauma, hold grudges, and, above all, remember our lives.
www.newyorker.com
October 29, 2025 at 2:14 AM
Reposted by Sophia (she/her)
🌈 😃 Now you can now define colors in the @Desmos 3D calculator that depend directly on coordinates.
www.desmos.com/3d/42d0f0d88f
October 28, 2025 at 8:38 PM
Reposted by Sophia (she/her)
For #mathober day 27:bidiminished I tried for a Parabidiminished Rhombicosidodecahedron in Polypad. Will not fold :-( polypad.org/tjsbVJj9afVOVQ Diminished means substituting a regular polygon fo a feature like a cupola.
Parabidiminished Rhombicosidod – Polypad – Polypad
Unleash your creativity with the world’s best virtual manipulatives!
polypad.org
October 28, 2025 at 1:34 AM
codepen.io/fractalkitty...

Today's #mathober - a metabidiminished icosahedron

#mathober2025
Bidiminished
...
codepen.io
October 28, 2025 at 4:40 AM
Today's #birdOfTheDay is #Heron so I'll leave this here - Heron's formula

www.fractalkitty.com/content/imag...
October 27, 2025 at 9:47 PM
Reposted by Sophia (she/her)
Feeling depressed and anxious about the state of the world? Try working on a 375 year-old math problem from the Platonic realm, which should be completely psychologically safe . . .
youtu.be/QH4MviUE0_s
Rupert's Snub Cube and other Math Holes
YouTube video by suckerpinch
youtu.be
September 16, 2025 at 2:23 PM
Reposted by Sophia (she/her)
Forgot to post this: #mathober day 25: wedge which led me to ungula and a bit of #geogebra. www.geogebra.org/m/nbyrdhcv
Ungula
Intersecting a plane and a surface of revolution.
www.geogebra.org
October 26, 2025 at 5:04 PM
Wedge
...
codepen.io
October 27, 2025 at 5:15 AM
My 14yr old is learning blender.

He already has a space capsule, rocket, and launch sequence. But this detail made my morning.
October 26, 2025 at 4:32 PM
I didn’t get to Margie’s prompt today. I went down a musical doodle wormhole.

I’ll post tomorrow
October 26, 2025 at 5:01 AM
Greater Yellowlegs were talking at the end of my run tonight. #birds #oregon #greateryellowlegs
October 25, 2025 at 4:11 AM
Number Field
...
codepen.io
October 25, 2025 at 4:08 AM