Formula of line divisor, , Formula of gradient of a straight line, , Gradient of parallel lines, , Two straight lines are perpendicular if and only if, , Area of triangle (given the three coordinates), , Area of quadrilateral, , Area of polygon, , Equation of locus which is equidistant from a fixed point, , Equation of locus which the distance from two fixed points is always constant in the ratio m:n, , Equation of locus which is always the same distance from two fixed points, , Sine rule, , Cosine rule, , Area of triangle (given the length of two sides and one included angle), , Semiperimeter, , Heron's formula.

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