回答: #L# = #sqrt(3842# または#61.98386887 説明: #d# = #sqrt(L ^ 2 = W ^ 2# #L# = #sqrt(d ^ 2 - W ^ 2# #L# = #sqrt(61 ^ 2 - 11 ^ 2# #L# = #sqrt(3721 - 121# #L# = #sqrt(3842#