Ответы на вопрос:
a1c1 = sqrt(a1d1^2+d1c1^2) = sqrt(2)
c1p = sqrt(pc^2+cc1^2) = sqrt(1+1/4) = sqrt(5)/2
a1p = sqrt(a1d^2+dp^2) = sqrt(2+1/4) = 3/2
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