Easy Tessellation Lesson using Pencil and Tracing Paper
Step 11 of 16
11. Copy that weird line 3 times.
Use pencil. Draw lightly; don't push hard.
First, put Page "B" on top of Page "A". Trace the new line onto the bottom and top of Page B's rectangle*.
Next, put Page "B" under page "A". Trace the new line onto the top of the rectangle on Page "A".
* A rectangle is easy, but any parallelogram is OK.