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In figure 1 the area of the square is 64 square units. In figure 2 the shapes are rearranged to form a rectangle ith an area of 65 square units. How do you justify the extra one squre unit?

 Dec 6, 2019
 #2
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Jenny, what you're describing is called a Tangram Vanishing Piece Puzzle

You can find a discussion (solution) of them here:  https://www.archimedes-lab.org/workshoptangram3.html     

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 Dec 7, 2019
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thank you so much!

xxJenny1213xx  Dec 7, 2019

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