for example i have an object, call it a cube.there's 6 sides of it, and the total area of the cube is about 6 times of its square's area. but if i have another object (3D complex for instance) how i can measure the total area ??please help on this one.thanx before that...

What program do you using?
In Revit Architecture it's easy.

sorry be late...i am using autocad software.