Assignment 2

Define a geometry data type in Haskell and use it to implement 
some functions

data Geometry = Point Int Int		-- x, y
              | Circle Int Int Int      -- x, y, radius
              | Rectangle Int Int Int Int -- x1, y1, x2, y2
              | Group [Geometry]
      
1) Define functions to compute:

	a) The area of the geomtric figure (counting overlaps as additional area)

	b) The bounding box of the geometric figure

2) Extend the data type and the two functions to include *triangles*.
      They need six Int's to specify the triangles points.