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Calculate the perimeter of an isosceles trapezoid with base length 4a. The length of the parallel side to the base is equal to half the base. The length of each of the two unparallel sides is a.
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of an isosceles trapezoid with base length 4a. The length of the parallel side to the base is equal to half the base. The length of each of the two unparallel sides is a.
