f(t): Formulas? What Formulas? Teaching Distance, Slope, and Midpoint
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Coordinate Geometry formula page to help you prepare for the ACT Math Test.
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The distance formula in rectangular (Cartesian) coordinates is the Pythagorean Theorem in disguise.  A lot of my students like this explanation.  It helps build off of knowledge that they already have from geometry.

The distance formula in rectangular (Cartesian) coordinates is the Pythagorean Theorem in disguise. A lot of my students like this explanation. It helps build off of knowledge that they already have from geometry.

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Where does the distance formula come from? Link to Pythagorean Theorem.
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Christine touched on the topic of trigonometry, think my eyes glazed over a bit....
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