Grogg splits an 11-gon into triangles by drawing all the diagonals from one vertex. Miraculously, each of these triangles has area 15. What is the area of the original 11-gon?
The number of diagonals drawn = 11 - 3 = 8
The number of triangles formed = 8 + 1 = 9
The area of the 11 - gon = 9 (15) = 135
+89 
