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Quadrilateral ABCDABCDABCD has angles ∠BDA=∠CDB=50∘,\angle BDA=\angle CDB=50^\circ,∠BDA=∠CDB=50∘, ∠DAC=20∘,\angle DAC=20^\circ,∠DAC=20∘, and ∠CAB=80∘.\angle CAB =80^\circ.∠CAB=80∘. Find ∠BCA\angle BCA∠BCA (in degrees).
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