It basically means the total space inside a 2D object. The calculations vary between objects.
http://wiki.answers.com/Q/What_is_area_pattern_in_...

1. Find the area of a rectangle before moving on to more complex shapes. Draw a rectangle on a piece of graph paper with a pencil. Count the number of squares making up the length
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Many seemingly magical tricks involving numbers aren't magical at all. They're simple algebra equations that make you look like a magician and make others shake their heads in amazement
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Trig. Calculus.
http://wiki.answers.com/Q/What_are_the_other_areas...
