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20023168

Рассмотрим треугольник АВD,угол D=90 угол А=60 по условию,следовательно,угол В=30,т.к.угол В=30 то АD=AB/2=6,аВD=AD*коронь из трех.S параллелограмма=ВD*AD=6корней из 3*6=36 корней из 3

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