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Real Numbers and the Rectangular Coordinate System

Video Summary:

The number corresponding to a particular point on the number line is called the coordinate of the point. This correspondence is called a coordinate system. Pythagorean Theorem In a right triangle, the sum of the squares of the lengths of the legs is equal to the square of the length of the hypotenuse. Distance Formula Suppose that P(x1, y1) and R(x2, y2) are two points in a coordinate plane. Then the distance between P and R, written d(P,R), is given by the distance formula.

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