![]() In addition to the fact that the parallel lines remain parallel to each other when rigid transformations are performed, the distance between the lines stay the same. \(\ell\) and \(m\) are not necessarily parallel to \(\ell'\) and \(m'\) (refer to the 90 degree rotation shown during the launch).Ask previously selected students who saw that the images of the parallel lines were parallel to the original in all three cases to share how they would answer the main question “What is the image of two parallel lines under a rigid transformation?” Make sure students understand that in general if \(\ell\) and \(m\) are parallel lines and \(\ell'\) and \(m'\) are their images under a rigid transformation then: ![]()
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