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Tim Guindon @tguindon.bsky.social · 21h

Excited to head to Atlanta next week for the @nctm.org Annual Meeting!
I'll be representing @desmos.com with a session on dynamic geometry software on Saturday. I’m putting together my agenda of sessions to attend — any recommendations? #iteachmath

NCTM branded "I'm speaking!" promotional card for the 2025 Annual Meeting & Exposition, Oct. 15-18, Atlanta.

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Tim Guindon @tguindon.bsky.social · 25d

Oh yea, definitely some different on-ramps depending on where kids are coming into it. Could be converted into smaller bite-size triangles to re-create using rectangular coordinates to start, but you know what would work best for your students. (Updated graph: www.desmos.com/calculator/h...)

A multi-color star design in the Desmos graphing calculator formed by 4 different triangles, defined in the expression list in the form of `polygon(x1,y1)`.

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Tim Guindon @tguindon.bsky.social · 25d

Love this concept, and the 3D printing potential is amazing. Maybe experiment with starting with triangle polygons plotted using different points, but then rotating them into a pattern?
Graph: www.desmos.com/calculator/h...

Blue star pattern designed in the Desmos graphing calculator by rotating equilateral triangles in 30 degree increments around the origin.

Purple star pattern designed in the Desmos graphing calculator by rotating right triangles in 30 degree increments around the origin.

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Tim Guindon @tguindon.bsky.social · 29d

Well that's a walk down memory lane.

List of Desmos saved graphs sorted by edit date, displaying the oldest graphs from November 2012.

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Tim Guindon @tguindon.bsky.social · Jul 11

Lovely.

Reposted by Tim Guindon

Erick Lee @theericklee.bsky.social · Jun 6

#MathArt project in calculus class today. Students generated "Reimondrian" art in @desmos.com. (Inspired by @mathzorro.bsky.social). Reimondrian is a mash up of Reimann sums and Piet Mondrian art. Some very creative students. #ITeachMath #MathsToday

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Tim Guindon @tguindon.bsky.social · May 23

That was great to see! I was pulling for you, along with the rest of the Toffee supporters apparently. (from www.reddit.com/r/Everton/co...)

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Tim Guindon @tguindon.bsky.social · Dec 19

I'm not going to venture to solve it directly, but this made me recall this visualization I had worked up at some point: www.desmos.com/3d/7239a9576c

Spinning Parametric Paths

www.desmos.com

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Tim Guindon @tguindon.bsky.social · Dec 13

Loving these trippy geometric patterns, and couldn't resist recreating these delightful squircles in @desmos.com www.desmos.com/calculator/p...

Checkerboard pattern of teal squares with rounded edges, giving the illusion of fluctuating wave.

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Reposted by Tim Guindon

Howie Hua @howiehua.bsky.social · Dec 12

Will this answer surprise you? Or is it intuitive?

#math #ITeachMath #EduSky

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Tim Guindon @tguindon.bsky.social · Dec 12

Looks like rain.
Graph: www.desmos.com/calculator/m...
#mathsky @desmos.com

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Tim Guindon @tguindon.bsky.social · Dec 11

Enjoyed re-creating this visual in the @desmos.com Geometry tool: www.desmos.com/geometry/lx7... #mathsky

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Tim Guindon @tguindon.bsky.social · Dec 11

Looks like a great option to give the 3D printer a spin!

3D printed model of the Goursat’s Tangle solid, in front of corresponding Desmos graph.

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Reposted by Tim Guindon

Desmos Studio @desmos.com · Nov 15

It's here.✨
Head to desmos.com/art to learn more, and be sure to submit your graphs by January 15th, 2025!
#MathSky #iTeachMath #iTeachPhysics #mathart #desmosart

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Tim Guindon @tguindon.bsky.social · Nov 15

Love this visual. You could do a gradual reveal using a slider, or toggle over to translucent surfaces (I know, not solids yet 🙃) to see through the outer cylinders.

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Tim Guindon @tguindon.bsky.social · Dec 4

So exciting - congrats, Jenny!

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Tim Guindon @tguindon.bsky.social · Oct 25

Some great strategies here for getting started with #Desmos #Geometry @desmos.bsky.social #MathSky #iTeachMath

DavidPetro314 @davidpetro314.bsky.social · Oct 25

[Updated Post] I'm not at #NCTMDC23 this year so instead I updated all of my 60s #geometry construction videos using @Desmos Geometry 2.0. Watch them here and have fun constructing your own:

engaging-math.blogspot.com/p/desmos-geo...

#Mathchat #MTBoS #iTeachMath #NCTM

Desmos Geometry Videos

On this page I will be posting some Mini Construction with Desmos Geometry Videos. These are using the new version of the Geometry calculat...

engaging-math.blogspot.com

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Tim Guindon @tguindon.bsky.social · Oct 24

Right? Loved the elegance of it.

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Tim Guindon @tguindon.bsky.social · Oct 24

Fun one to visualize in #Desmos #Geometry - Given a regular n-gon inscribed in a unit circle, the product of the chords from one vertex of the polygon to all the others is equal to n. www.desmos.com/geometry/pb3...
Inspiration from this delightful poster: diffgeom.com/products/pro...
#MathSky

Regular pentagon inscribed in a circle with chords connecting one vertex to all the others, and lengths whose product is equal to 5.

Regular dodecagon inscribed in a circle with chords connecting one vertex to all the others, and lengths whose product is equal to 5.

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Tim Guindon @tguindon.bsky.social · Oct 18

Totally agree on the GIFs. Delightful graphs, though!

Tim Guindon @tguindon.bsky.social · Oct 18

Some therapeutic spirals in #Desmos 3D.
www.desmos.com/3d/0bdf71e576

Spiraling 3D surface, increasing up the z-axis. Color shading from blue out to pink.

Spiraling 3D surface, increasing up the z-axis. Color shading from green out to blue.

Spiraling 3D surface, increasing up the z-axis. Color shading from red out to green.

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Tim Guindon @tguindon.bsky.social · Oct 16

A delightful Geometry theorem, illustrated using the #Desmos Geometry tool with visual shading and calculations showing the equivalent lengths. #🧮 www.desmos.com/geometry/bpn...

On a circle, points A, B, and C form an arc. Point D is the midpoint of the arc. Segments AB and BC are drawn, and a perpendicular line from point D down to segment AB. Segment AB is shaded blue, and segments EB and BC are shaded orange, demonstrating their equivalence.

Calculation demonstrating that the length of AE is equal to the sum of EB and BC.

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Tim Guindon @tguindon.bsky.social · Oct 11

When using custom colors in #Desmos (@desmos.bsky.social), RGB felt straight-forward enough, but I didn't have a clear grasp on what each component of HSV did. Turns out that it's much easier to visualize in 3D.
#🧮 #MathSky
Graph: desmos.com/3d/180b54127d

A 3D visualization of the HSV color scale of a spherical point changing color as variables for hue, saturation, and value are adjusted. Points form a roughly cylindrical shape where the vertical distance changes the "value", the radius changes the "saturation", and the angle changes the "hue."

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Tim Guindon @tguindon.bsky.social · Oct 6

Playing around with the "impossible cube" in Desmos 3D. Graph: www.desmos.com/3d/52f2f13aaa

The "Impossible Cube", a two-dimensional figure that superficially resembles a perspective drawing of a three-dimensional cube, with its features drawn inconsistently from the way they would appear in an actual cube. (from Wikipedia)

The "impossible cube" rotated slightly in 3D space, revealing a disconnect in the front edges of the cube, creating the illusion.

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Tim Guindon @tguindon.bsky.social · Oct 5

Seeing lots of Desmos 3D discussion around surfaces of revolution for Calculus. While parametrics are great for showing the act of rotation (see: desmos.com/3d/1a7f86ac77), I'm also loving this strategy, accessible to students who have seen equations of circles before: desmos.com/3d/0439a67934

Screenshot from Desmos 3D, showing a surface of revolution of the function f(x)=2-sin(x) using the expression y^2+z^2=f(x)^2

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