Challenging Perimeter Problem
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Perimeter of rectangle covered by 9 non-overlapping squares. From 200) American Invitational Math Exam
More free lessons at: http://www.khanacademy.org/video?v=1uWZNW5PF-s
More free lessons at: http://www.khanacademy.org/video?v=1uWZNW5PF-s
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