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Answer:
∠CAD = 34°
Step-by-step explanation:
∠OBA + ∠BOA + ∠OAB = 180
56° + 90° +∠OAB = 180
146° + ∠OAB = 180
∠OAB = 34°
IN ΔABC,
AC=AB
∴∠CBA = ∠BCA
∠CBA+∠BCA+∠BAC=180°
56+56+∠BAC=180°
112°+∠BAC = 180°
∠BAC=68°
∠CAD=∠DAB=∠BAC÷2
∠CAD = 68÷2
∠CAD = 34°
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