Finding definite integrals using area formulas | AP Calculus AB | Khan Academy

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.

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.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today!

[maniicodes]

Whoever made khan academy deserves it all

[manojbamnia]

As integration means: AREA under the Curve

[vaibhavkhobragade]

last but not least I wanna thank sal khan for making this video

[kirannb]

With what basis, OR How do you choose the amplitude of the curves in graph..

[Connor-otot]

In the 3rd question, you only integrated x = 1 to 3, rather than 1 to 4

[yoongi]

what about parabolas? do they use the same area formula of a circle?

[weucfhb]

i cant believe this, my has been on this topic for over a week and here in only 4 mins...