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Mathematics 15 Online
OpenStudy (anonymous):

What is the most precise name for quadrilateral ABCD with vertices A(-5, -1), B(-5, 3), C(-2, 3), and D(-2, -1)?

OpenStudy (mathmate):

First step, draw a sketch:

OpenStudy (mathmate):

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OpenStudy (mathmate):

Then check the slopes of the sides, and the lengths.

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