In the flatland movie there was a very curious hexagon who lived with her grandparents, and wanted to know why the circle people killed her parents. The flatland people have a rule that the more sides a person has the more superior they are until they have so many sides that they become a circle. The circles know of the third dimension but they do not want the rest of Flatland to know so they said anyone who knows gets arrested.  The hexagons grandpa has a dream about 4 different dimensions which are a dot which is zero dimension, a line which is 1st dimension, a square(himself) which is 2nd dimension, and length, width, and height which is 3rd dimension. Their is also a 4th dimension but we do not know much about it.