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Math Help - Nine congruent rectangles

  1. #1
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    Nine congruent rectangles

    There are nine congruent rectangles that form a larger rectancle whose area is 720 units^2. What is the perimeter of the large rectangle. Then prove how you found this answer.

    Thank you in advance!!
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    Quote Originally Posted by Heather10 View Post
    There are nine congruent rectangles that form a larger rectancle whose area is 720 units^2. What is the perimeter of the large rectangle. Then prove how you found this answer.

    Thank you in advance!!
    Please see attached file.
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