It depends on what information you have. In the simplest case, if you know the length of a sides of a square is x units, then the are is x*x = x2 square-units
The answer will depend on what information you have.
area of dish end
You need to use an integral. And the formula for an integral will vary depending on the shape of your non square area.
The formula for the surface area of a circle is pi times the square of the radius. The formula for the surface area of a triangle is base times height, divided by 2. The formula for the surface area of a square or rectangle is length times width.
Area of a circle measured in square units = pi*radius2
(2/3)*base*height
http://wiki.answers.com/Q/What_is_the_mathematical_formula_for_calculating_a_surface_area_for_a_building"
calculating surface area
Any formula that generates a correct solution every time is a 'correct' formula.Here's a formula for the area of a square that qualifies as a correct one:If 'S' is the length of each side of the square, then the area 'A' of the square isA = S2
6(pi)l2, where l = length of side
the formula is lengh times width
2(l*w)+2(w*h)+2(l*h)=surface area