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 perform a geometric proof of the Pythagorean theorem.
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How To: Remember "greater than" & "less than" symbols

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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the coordinate of a point

How To: Simplify surds (improper square roots)

How To: Find a slope of a straight line with: Ax + By + C = 0

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

How To: Find the formula of a piecewise function given a graph

How To: Solve for the missing ratios or proportions

How To: Solve word problems involving domain and range

How To: Quickly find the area of a trapezoid

How To: Do long division without a calculator

How To: Find the Percent Given Two Numbers

How To: Calculate percent composition for chemistry

How To: Find the Slope Given 2 Ordered Pairs

How To: Find a missing side of a triangle, similar to another

How To: Learn Calculus in 20 minutes

How To: Find extra points for a parabola (quadractic equation)

How To: Calculate the height and volume of a pyramid
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