Cut the largest square from a rectangle 10 cm long, and the perimeter of the remaining figure is () cm
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The perimeter of a rectangle and a square refers to (). According to the answer, you think the perimeter of a closed figure refers to ()
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The perimeter of a rectangle and a square is the sum of the lengths of the four sides,
The perimeter of a closed figure refers to (the sum of the lengths of all line segments enclosing the closed figure)