Need help figuring out how to determine the length of the sides of a right triangle? Need to know how to solve a matrixform linear equation in algebra? 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 finish your homework or 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 use the Pythagorean theorem to make right triangle calculations in basic geometry.
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How To: Do long division without a calculator

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

How To: Find the area & perimeter of triangles & squares

How To: Divide small numbers by big numbers

How To: Use the ratio formula to find coordinates of a point

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

How To: Do long division with decimals

How To: Solve percentages without a calculator

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1 Comment
Nice job. The Pythagorean Theorem is so helpful in Geometry
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