Find the smallest unit cell!

Find the smallest unit cell!
Instructions

print out the following slide with the lattice we have
created

use a ruler and a pencil to draw unit cells

measure the unit cell edge lengths to compare the sizes
of the unit cells

discuss your solutions either in your learning groups or
with other classmates in the discussion forum

after watching chapter 3, in particular unit 3.7, you even
can try to find out to which wallpaper group this pattern
belongs
Find the smallest unit cell!