There are two identical rectangular pieces of paper, 8 cm in length and 3 cm in width. If you stack them together as shown in the figure, what is the perimeter of the figure

There are two identical rectangular pieces of paper, 8 cm in length and 3 cm in width. If you stack them together as shown in the figure, what is the perimeter of the figure

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There is a round piece of paper, 8 cm in diameter. Fold it in half, fold it in half, fold it in half, and then fold it in half. Then you get a new figure. Find the perimeter of the new figure

1. Fold in half, fold in half, fold in half again, that is, divide the circle into eight parts on average. The perimeter of the new figure is actually determined by
Perimeter of 1 / 8 circle + 2 radii = perimeter of new figure
1/8×3.14×4×2＋4×2=11.14（cm）

If you dig out a square (square or rectangle), the perimeter of the remaining figure is the same as the original. How should you cut it?

Cut a rectangle or square in a corner of the square, with the same circumference. Do you understand? Ah! Do you know how to ask again?