Sub copier()
Dim Plage As Range, Desti As Range
Dim Lig As Long
Set Plage = Sheets("Saisie").Range("A11:H11")
Lig = Sheets("Synthèse").Cells(Rows.Count, 1).End(xlUp).Offset(1, 0).Row
Set Desti = Sheets("Synthèse").Range("A" & Lig & ":H" & Lig)
Desti.Value = Plage.Value
End Sub