Flatland, the two-dimensional world of Edwin A. Abbott’s 1884 math fiction novel is as challenging today as it was 125 years ago. Using Abbott’s story, students design and build a 2D city. In Flatland nothing has thickness, not even its inhabitants. Is this possible? What challenges does the 3D world have in common with Flatland? This math adventure will include the relationship between one-, two-, and three- dimensional figures; angles, polygons and their properties; and mastering Euclidean geometry constructions using only a compass and straight edge.