A:x-1=4
B:4x=1
C:4x-1=3x+3
D:2(x-1)=1
— Nothing, I just want to try my best.
如图,直线11//l2,等腰直角△ABC的两个顶点A、B分别落在直线ll上,∠ACB=90°,若∠1=15°,则∠2的度数是( )