Figurate numbers: Difference between revisions

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-Most of us are familiar with triangular numbers, such as the arrangement of ten bowling pins in a triangle,
+#REDIRECT [[Activities/TurtleArt/Tutorials/Figurate_Numbers]]
-&nbsp;&nbsp;&nbsp;.<br>
-&nbsp;&nbsp;.&nbsp;.<br>
-&nbsp;.&nbsp;.&nbsp;.<br>
-.&nbsp;.&nbsp;.&nbsp;.
-or square numbers,
-.&nbsp; .&nbsp; .&nbsp; .<br>
-.&nbsp; .&nbsp; .&nbsp; .<br>
-.&nbsp; .&nbsp; .&nbsp; .<br>
-.&nbsp; .&nbsp; .&nbsp; .
-but we don't necessarily know how their arithmetic works, or whether we can do the same with, say, pentagons.
-Can we learn something by telling a turtle how to make these numbers? Let's try.