问题:
如图,弦AB和CD相交于点P,∠B=30°,∠APC=80°,则∠BAD的度数为( )
A.20°
B.50°
C.70°
D.110°
如图,弦AB和CD相交于点P,∠B=30°,∠APC=80°,则∠BAD的度数为( )
A.20° | B.50° | C.70° | D.110° |
参考答案: