step-by-step explanation:
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δabc ≅ δdcb by sas because
db ≅ ac . . given (side)
bc ≅ bc . . reflexive property (side)
∠dbc ≅ ∠acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)
answer: i think one of the answer is $150 and $300?