(1) Find (and describe) all the regular tessellations of the plane. Note that septagons, nonagons, and 11-gons are not provided. How do you know each one you find really fills in all the gaps around a vertex point? How do you know when you're done?
(2) Find ( and describe) all the semiregular tessellations of the plane ( you will need to find a good way to denote them.)
(3) what triangles will tessellate the plane? Try all kinds.
(4) which quadrilaterals will tessellate the plane ? try all kinds.