Each pentagon grows two more...[br][br]That raised a lot of questions for me. Like:[br]Is there a rule for how many pentagons at each step? For total number of pentagons after each step?[br]Is there a rule for exposed edges at each step? Total?[br]Is there a rule for number of new vertices at each step? Total?[br]Is there a rule for the number of rhombi at each step?[br]Is there a last step to the pattern?[br]Will the pentagons enclose regular polygons next to the original yellow pentagon?

More GeoGebra at [url]mathhombre.blogspot.com[/url]