The coordinates of A and C are 4 and 0.
AC = (Distance formula)
= or 4 (Additive identity property: )
The measure of AC line is or 4.
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4 and 0.![\"graph](\"http://www.mathskey.com/userfiles/image/Library/Geometry/graph_coordinates_A_B_minus4_minu1%281%29.gif\")
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(Distance formula)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9186bc0a085ac96579f957d1955dfe83.png\")
or 4 (Additive identity property: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7aa68555c83e2d4fef62567f7720c317.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
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or 4.