{ [ 10·cos(60°) - 10·cos(30°) ]^2 + [ 10·sin(60°) - 10·sin(30°) ]^2 }^0.5{ [ 10·cos(60°) - 10·cos(30°) ]^2 + [ 10·sin(60°) - 10·sin(30°) ]^2 }^0.5

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