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

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

How To: Find the Percent Given Two Numbers

How To: Normalize a data set into another scale

How To: Find a number given Its percent

How To: Solve an equation with a radical under a radical

How To: Do long division without a calculator

How To: Solve percentages without a calculator

How To: Calculate Faster Than a Calculator

How To: Convert between diameter and radius

How To: Find the slope from a set of points

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

How To: Solve problems involving functions in algebra

How To: Find the equation of a circle given: center & tangent

How To: Calculate the height and volume of a pyramid

How To: Find the Slope Given 2 Ordered Pairs

How To: Find a percent of a number

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

How To: Learn Calculus in 20 minutes

How To: Solve problems involving deductive reasoning
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