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In this section you will integrate classic area equations for squares, rectangles, semi-circles, and triangles to find the volume of cross sectional areas. Most of the area equations are really easy! The hardest one (tied with semi-circles) is shown in the example below. For semicircles, make sure you draw in the semi-circles so you can see precisely what the radius is (usually 1/2 the difference between the curves).
Below is a table of the pertinent equations for cross sections. You should know most of these :).
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