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A level Maths Questions and Answers 100% Pass
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A level Maths Questions and Answers 100% Pass if two lines are perpendicular, what must their gradients equal to when multiplied together? -1 What is the equation to calculate the gradient of a line? y₂-y₁/x₂-x₁ What is the equation to calculate the length of a line? √(y₂−y₁)^2 + ...
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