Thursday, February 6, 2014

Parallel Lines and Bar Codes















The bar code on this eraser demonstrates Theorem 3-7, which states that in a plane two lines perpendicular to the same line are parallel.


Lines j and k are both in plane z, and they are both perpendicular to segment AB. Since they are both perpendicular to segment AB, the lines of the barcode are parallel. (~LSU)

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