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Mr. Javier designed an arch made of bent iron for the top of a school's main entrance. The 12 segments between the two concentric semicircle are each 0.8 meter long. Suppose the diameter of the inner semicircle is 4 meters. What is the total length of the bent iron used to make this arch?
Mr. Javier designed an arch made of bent iron for the top of a school's main entrance. The 12 segments between the two concentric semicircle are each 0.8 meter long. Suppose the diameter of the inner semicircle is 4 meters. What is the total length of the bent iron used to make this arch?
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