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OpenStax, Algebra and Trigonometry 2e §2.2 Linear Equations in One Variable · Exercise 70 · Algebra · Inequalities

Linear Equations in One Variable · Exercise 70

Given that the following coordinates are the vertices of a rectangle, prove that this truly is a rectangle by showing the slopes of the sides that meet are perpendicular.
and

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OpenStax, Algebra and Trigonometry 2e · §2.2 Linear Equations in One Variable · Exercise 70

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