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2.1 Rectangular Coordinates

# 2.1 Rectangular Coordinates - 2.1 Rectangular Coordinates...

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2.1: Rectangular Coordinates Distance Formula: d(P 1 , P 2 ) = x x y y 2 1 2 2 1 2 - + - b g b g Converse of Pythagorean Theorem: If a 2 + b 2 = c 2 (where c is the hypotenuse and a and b are legs), then the triangle is a right triangle. Isosceles triangles have two sides of equal length; equilateral triangles of three sides of equal length. Area of a triangle: A = ½bh Midpoint Formula: x x y y 1 2 1 2 2 2 + + F H G I K J , Find the distance between the points and midpoint for the following:

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