1. The side of a aquare is 2 cm. Four triangles are cut from the corns of the square and a regular octagon (8-sided polygon) is formed. Find the length of each side of the cotagon.(Give the answer correct to 3 significat figures.)
2. A wire of length 60cm is cut into 2 parts. Each part is then bent to form a square. If the total area of the two squares is 117 cm2次, find the perimeter of each square.
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