From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to demonstrate that a diagonal line drawn from one corner of a rectangle to another will generate two equivalent triangles.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Calculate the area of a triangle using a basic formula

How To: Remember "greater than" & "less than" symbols

How To: Do long division without a calculator

How To: Calculate percent composition for chemistry

How To: Subtract a mixed number from a proper fraction in basic math

How To: Find the area of a triangle when given 2 sides & angle

How To: Find the coordinate of a point

How To: Find the Radius of a Circle from Arc Length

How To: Learn Calculus in 20 minutes

How To: Translate a sentence into math symbols

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How To: Find the Percent Given Two Numbers

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