Sure! It’s a tessellation of squares made with Geometer’s Sketchpad, but with each square-side replaced by two semicircles, pointed in opposite directions. After making that with Sketchpad, I took a screenshot, then added the colors using MS-Paint. If you look me up on Facebook (see “Contacting RobertLovesPi”), you’ll see I have something similar as my cover photo there, but using triangles instead of squares for the tessellation.
I paid a hundred bucks or so for it — roughly the same amount I paid for Stella 4d, the program I use to make all the spinning polyhedra on this blog. I don’t have the latest version of Sketchpad, though, but the version I have does just fine for what I need. You can find Sketchpad easily with a Google-search — it’s sold by Key Curriculum Press. As for Stella 4d, every post I make using it has a link to the website where you can try it (as a free trial download), and then purchase it if you like it.
Now you’re embarrassing me! I know the person, an Australian, who wrote Stella 4d . . . and, believe me, he can run circles around me when it comes to anything mathematical.
One advantage of Stella 4d: the trial download is free! You can give it a try for nothing!
RobertLovesPi.net 
Can you share how you did that? It’s eye-boggling!
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Sure! It’s a tessellation of squares made with Geometer’s Sketchpad, but with each square-side replaced by two semicircles, pointed in opposite directions. After making that with Sketchpad, I took a screenshot, then added the colors using MS-Paint. If you look me up on Facebook (see “Contacting RobertLovesPi”), you’ll see I have something similar as my cover photo there, but using triangles instead of squares for the tessellation.
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How clever! I haven’t heard of Geometer’s Sketchpad. Is it expensive?
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I paid a hundred bucks or so for it — roughly the same amount I paid for Stella 4d, the program I use to make all the spinning polyhedra on this blog. I don’t have the latest version of Sketchpad, though, but the version I have does just fine for what I need. You can find Sketchpad easily with a Google-search — it’s sold by Key Curriculum Press. As for Stella 4d, every post I make using it has a link to the website where you can try it (as a free trial download), and then purchase it if you like it.
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Thanks for the info. Not a bad price for as much as YOU use it! I think I’d use the Geometer Sketchpad more. Stella 4d seems intimidating.
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If I had to choose between one or the other, I’d go with Stella 4d — easily.
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I knew that!
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That’s why you’re Dr. Pi and I am not.
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Now you’re embarrassing me! I know the person, an Australian, who wrote Stella 4d . . . and, believe me, he can run circles around me when it comes to anything mathematical.
One advantage of Stella 4d: the trial download is free! You can give it a try for nothing!
Here’s the trial-download link, in case you’re interested: http://www.software3d.com/Stella.php.
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Reblogged this on Wacks Formula – Math Shortcuts.
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