Distance formula, Mid point formula, Centroid formula, Section formula, Six trigonometric ratios, Important trigonometry formulae, Relation between inscribed and central angle, Ratio of areas of two SIMILAR triangles, Side opposite to 300 = 1/2 X hypotenuse and side opposite to 600 = √3/2 X hypotenuse, 30-60-90 triangles, sides opposite to 450 = 1/√2 X hypotenuse, 45 - 45 - 90 triangles, 1/2xbasexheight, Area of triangle

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