AC=(1/cos60) *AB=10дм
AC диаметр =2R=>R=5дм
BC=√(10^2-5^2) =5√3
R=5дм
AC=10дм
BC=5√3дм
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AC=(1/cos60) *AB=10дм
AC диаметр =2R=>R=5дм
BC=√(10^2-5^2) =5√3
R=5дм
AC=10дм
BC=5√3дм