Geometiles

Single seed of saltify.

This jumbo size dandelion is called a salsify, to the best of my knowledge. The tiny broom is a single seed. The “heart” has Fibonacci spirals. Could the spherical looking flower be a spherical Fibonacci mapping? Seen in North Rim, Grand Canyon NP. #mathsky #Fibonacci

Pi-lights and other (ner)delights - Geometiles®

A visit to a Caltech building that merits its own blog: geometiles.com/pi-lights-an... #mathart #mathematicalart #mathsky

Some piñata inspired polyhedra for #CincoDeMayo2025 ! #mathart #mathematicalart #mathsky

Look what the #easteregghunt turned up! #mathsky #edusky #mathart

My most recent homage to #eggs— the bottom is half of an icosidodecahedron, and the top is part of a rhombicosidodecahedron. #mathsky #edusky #mathart

Bon appetit! 🍳
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#AprilFools #AprilFoolsDay #mathsky #mathart

It's #NationalQuiltingMonth ! What better time to incorporate math teaching and quilting.
Read our new blog:https://geometiles.com/quilting-blocks-and-geometiles-old-meets-new #mathsky #edusky #mathart

Day 22 of #mathartmarch inspired me to make this section of a torus with a #hexagon shaped cross section. #mathsky #mathart

Day 17 of #mathartmarch entry: symmetry. This pattern is called “Night Sky” and was designed by Julie Herman of Jaybird Quilts. #mathsky #mathart

Celebrating #nationalquiltingmonth with two classic quilting blocks: the Sawtooth Star and Dutchman’s Puzzle. Geometiles allow you to create these patterns quickly so that you can focus on their geometry even if you don’t know how to sew. See Geometiles.com/quilts for examples. #mathsky #edusky

Celebrating this year’s Pi(e) Day with this fluted number! It comes with its own pie stand, made for the occasion. Watch video to see how two flat surfaces come together to make the pie— or should I say PIElyhedron?? Mobies make the thin pedestal of the pie stand possible. #mathsky #piday2025

Wait for it… this 7 yr old is discovering a new way to play with Geometiles. He’s treating the chain of rectangles as a multi-hinge system, and he finds it “satisfying” to experience the system unfold from a triangle to various other shapes under the effect of gravity. #edusky #mathsky #iteachmath

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Yesterday at the @mathhappens.bsky.social
booth at the San Diego Festival of Science & Engineering
with @nhoskee.bsky.social
and blocks by @triangleman.bsky.social
and @mathforlove.bsky.social
#iteachmath #edusky #mathsky app2.ricoh360.com/viewer/30903...

Kente cloth inspired pattern

African zigzag inspired cube.

This #BlackHistoryMonth I’ve been looking at the origins of African American crafts. The pattern in the first picture is inspired by Kente cloth. The cube design is based on the zigzag pattern often seen in African art. #mathsky #mathart #mathematicalart

Jim, it’s at the UTC mall.

Mirrored triacontahedron (30-faces) at the @byltbasics.bsky.social store at the local mall. This solid was discovered by Johannes Kepler. It is dual to the icosidodecahedron. #mathsky #mathart

Thanks very much! All the shops I could think of are already listed on your page.

Want a perfect Valentine’s Day gift for the person in your life who likes math and/or building things and/or hearts? Check these out. Geometiles.com/product-cate... .$27 including shipping in US.♥️🤍💙 #mathsky #edusky #iteachmath #valentinesday2025 #valentinesgift

Year of the Snake

Happy Year of the Snake!
#mathart #mathsky #iteachmath #yearofthesnake

Seattle Themed Volume Problem - Geometiles®

At the recent Joint Math Meeting, I ran a contest.
“The yellow and green tetrahedra are both completely filled with coffee beans. The yellow one contains 93 beans. How many coffee beans are in the green tetrahedron?”
The result may surprise you. #mathsky #edusky #mathed #iteachmath #jmm2025

The last day of the Joint Math Meetings is always bittersweet because that’s when I get to interact with really young mathematicians, but not nearly for as long as I’d like. 9 yr old boy with an elegant structure he designed on his own; girl discovering the #hattile. #jmm2025 #mathsky #edusky

YouTube video by Geometiles Inside the Octacubes Structure

Here's a video set to music of the spherical picture of the octacube structure built by Glen Whitney and Seattle Universal Math Museum at the Joint Math Meetings. #jmm2025 #mathsky #mathart youtube.com/shorts/8KYe7...

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Even if you didn’t get a chance to attend #jmm2025, you can experience what it’s like to be inside Glen Whitney’s giant structure thanks to #ricohtheta.
app2.ricoh360.com/viewer/aeea7...
#mathsky

Kudos to David Weed, of UC Riverside, for winning the coffee bean contest at #JMM2025 ! One of the yellow tetrahedra had 93 coffee beans, and his guess for the number of beans in the green one was 205, just 1 over the correct number. V(green)=2 V(yellow) by Cavalieri’s principle.

DONT MISS THE FUN
IN BOOTH 331! #jmm2025

Still catching my breath after the opening reception at the #JMM2025. This star summarizes my experience: raucous geeky fun. Thank you to the person who made this— you’re the first person to build this shape.

At the #jmm2025 ? Try our coffee bean estimating contest before you leave the opening reception.

If you're planning to attend
#JMM2025 next week, stop by Booth 331 for a view of the Space Needle and to participate in our Seattle themed estimation challenge. We'll be next to the Math Art Exhibit, where you can see my piece "Full Circles". #mathart #mathematicalart #mathsky

A Special Year - Geometiles®

We’re about to embark on a SQUARE YEAR! #mathsky #iteachmath

Just in time for #chanukah2024 , here is an easy to make Geometiles Dreidel. It’s made of eight 30-60-90 triangles and four right isosceles triangles. You need to improvise your own handle for spinning it — I just glued together 4 coffee stirrers. #mathsky #iteachmath #iteachphysics