Each of the nine triangles in the figure below has the same area. ABY, BCY and AYD take up 2/9, 1/9 and 4/9 of this shape, respectively and hence 1/9,1/18 and 2/9 of the hexagon.
Each of the nine triangles in the figure below has the same area. ABY, BCY and AYD take up 2/9, 1/9 and 4/9 of this shape, respectively and hence 1/9,1/18 and 2/9 of the hexagon.