∵∠CAB=∠B=2∠C,∠CAB+∠B+∠C=180
∴2∠C+2∠C+∠C=180
∴∠C=36
∴∠CAB=∠B=72
∵AD平分∠BAC
∴∠BAD=∠CAB/2=36
∴∠ADC=∠BAD+∠B=36+72=108