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Filling bag
Cut off the bottom of a bag so that the base is twice as long as the height. Then cut out a square whose diagonal is equal to the base of the bag. Without bending or folding the square, put it entirely inside the bag. 
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Filling bag
Cut off the bottom of a bag so that the base is twice as long as the height. Then cut out a square whose diagonal is equal to the base of the bag. Without bending or folding the square, put it entirely inside the bag.
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