Tile the plane.

Create a flat shape. Divide it. Repeat it. Avoid gaps. Don’t overlap. Tesselate.

Only three polygonal shapes can, on their own, tesselate on a two-dimensional plane, edge to edge, without gap or overlap. Equilateral triangles, squares, and regular hexagons. The restrictions of the interior angles of the polygon when the sum of the angles that meet at the vertex is equal to exactly 360 degrees makes tessellation possible.

What’s your angle? Embrace the restriction. Tesselate!