Is this a semi regular tessellation? Why or why not? If it IS a semi-regular tessellation, what is the code? If it is NOT a semi-regular tessellation, then what are two possible codes?[br][br]To explore, move anything [color=#1551b5]blue[/color].

Two regular polygons don't move; which are they?[br]How am I sure I have all nine generators?[br]What other regular or semiregular tessellations are there? How can you find them?