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 (or just study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve problems with the Pythagorean theorem in geometry.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Do long division without a calculator

How To: Find a number given Its percent

How To: Identify characteristics of a sample during a survey

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

How To: Find a missing coordinate given: coordinate & equation

How To: Find the Percent Given Two Numbers

How To: Divide small numbers by big numbers

How To: Calculate percent composition for chemistry

How To: Find the Volume of Composite Figures (Also Called Composite Shapes)

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

How To: Determine the age of a fossil using carbon14

How To: Find Leg Lengths and Hypotenuse of a 45 45 90 Triangle

How To: Calculate the area of a parallelogram

How To: Find the 100th term in a sequence

How To: Evaluate square roots

How To: Find the coordinate of a point

How To: Find the value of a variable in an algebraic equation

How To: Solve equations involving square roots

How To: Use a TI89 to calculate nCr
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