∵∠BAC=63°
∵∠ABC+∠BAC+∠ACB=180°
∴∠ABC+∠ACB=117°
∴3∠ABC=117°
∴∠ABC=∠BAD=39°
∵∠BAC=∠BAD+∠CAD=63°
∴∠CAD=24°
∵∠ADC=∠DAB+∠ABD
∵∠DAB=∠ABD
∴∠ADC=2∠ABC=2*39°=78°
∵∠BAC=63°
∵∠ABC+∠BAC+∠ACB=180°
∴∠ABC+∠ACB=117°
∴3∠ABC=117°
∴∠ABC=∠BAD=39°
∵∠BAC=∠BAD+∠CAD=63°
∴∠CAD=24°
∵∠ADC=∠DAB+∠ABD
∵∠DAB=∠ABD
∴∠ADC=2∠ABC=2*39°=78°