A Blue and Yellow Tessellation Made with Semicircles

RobertLovesPi on 29 October 2014 at 20:41 said:

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.

LikeLiked by 1 person

Reply ↓
- teachezwell on 29 October 2014 at 20:45 said:
  
  How clever! I haven’t heard of Geometer’s Sketchpad. Is it expensive?
  
  LikeLiked by 1 person
  
  Reply ↓
  - RobertLovesPi on 29 October 2014 at 20:49 said:
    
    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.
    
    LikeLiked by 1 person
    
    Reply ↓
    - teachezwell on 29 October 2014 at 20:54 said:
      
      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.
      
      LikeLike
    - RobertLovesPi on 29 October 2014 at 20:55 said:
      
      If I had to choose between one or the other, I’d go with Stella 4d — easily.
      
      LikeLiked by 1 person
    - teachezwell on 29 October 2014 at 20:57 said:
      
      I knew that!
      
      LikeLiked by 1 person
    - teachezwell on 29 October 2014 at 20:57 said:
      
      That’s why you’re Dr. Pi and I am not.
      
      LikeLiked by 1 person
    - RobertLovesPi on 29 October 2014 at 21:00 said:
      
      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.
      
      LikeLike