Math Olympiad for Elementary | 2018 | Division E | Contest 2 | MOEMS | 2E

Problem: In the figure, the octagon is formed by overlapping two squares.
The overlapping region is also a square. The larger square has a
side length of 6 cm. The smaller square has one corner at the
center of the larger square, and the smaller square has a side
length of 4 cm. How many centimeters is the perimeter of the
octagon?

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