Drag B to form a tiling of triangles. [br]Open the empty spaces to form a tiling of green triangles and three-pointed stars. [br]For what range of angles will you get three-pointed stars? [br]Form a tiling of green triangles and big white triangles. [br]What angle will give you white equilateral triangles? [br]Form a tiling of green triangles and white hexagons. [br]What angle will give you regular hexagons?