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Since definite integrals are the net area between a curve and the x-axis, we can sometimes use geometric area formulas to find definite integrals. See how it's done.

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AP Calculus AB on Khan Academy: Bill Scott uses Khan Academy to teach AP¨_ Calculus at Phillips Academy in Andover, Massachusetts, and heÕs part of the teaching team that helped develop Khan AcademyÕs AP¨_ lessons. Phillips Academy was one of the first schools to teach AP¨_ nearly 60 years ago.

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