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∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD
=80°,∠ACB=40°,则∠ACD等于( ) A.80° 60° 40° 20°
AB=DC,AC=DB AB=DC,∠ABC=∠DCB BO=CO,∠A.=∠D AB=DC,∠DBC=∠ACB
∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD
∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD
∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD
AB=DC,AC=DB AB=DC,∠ABC=∠DCB BO=CO,∠A.=∠D AB=DC,∠DBC=∠ACB
∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD ,
AB=CD,AC=BD AB=CD,∠ABC=∠BCD ∠ABC=∠DCB,∠A.=∠D AB=CD,∠A.=∠D.
AB=DC,AC=DB AB=DC,∠ABC=∠DCB BO=CO,∠A.=∠D AB=DC,∠DBC=∠ACB
∠A.=∠D AB=DC ∠ACB=∠DBC AC=BD