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CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
∠DAC=∠BCA ∠BAC=∠DCA ∠DAC=∠BAC ∠B.+∠BCD=180°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
AB=AD AC⊥BD AC=BD ∠BAC=∠DAC
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B=∠D=90°
AB=AD ∠BCA=∠DCA CB=CD ∠ADC=∠ABC
∠ =∠D.=90°B.∠BCA=∠DCA ∠BAC=∠DAC CB=CD
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B=∠D=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B.=∠D.=90°
CB=CD ∠BAC=∠DAC ∠BCA=∠DCA ∠B=∠D=90°
∠DAC=∠BCA ∠DCB+∠ABC=180° ∠ABD=∠BDC ∠BAC=∠ACD
CB=CD ∠BCA=∠DCA ∠BAC=∠DAC ∠B.=∠D.=90°
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