As you can see, it's pretty simple to create a tessellation with regular polygons. But what about irregular ones? Follow the steps below to create a shape all your own and then make a very individualized tessellation from it!

• Click Sheet 2 at the bottom of your spreadsheet. You now have a clean slate to work on.
• Click View>Zoom>200 percent, and then click OK. (You need to be very close up for this!)
• Click the Lines tool on the Drawing toolbar, and then click Freeform.
  
  
  
• The freeform tool allows you to create a polygon with straight lines. We want to draw a three-sided polygon with two straight sides and one jagged side. So, holding down the shift key (which keeps the lines straight), draw a line from the top left corner of cell A1 to the bottom left corner of cell A4.
• Don't stop yet! Keep drawing to the far right corner of cell A4.
• Don't stop yet. This is the fun part! Draw a zigzag pattern of your own choice -- one that eventually will connect your last line's endpoint to your first line's starting point.
• When you've connected the end of the zigzag line to the starting point�click. Your polygon should look something like this:
  
  

Next: Time for reflection.