问题:
A,B,C,D,依次是⊙O上的四个点,
AB
=
CB
=
CD
,弦AB,CD的延长线交于P点,若∠ABD=60°,则∠P等于( )
A.40°
B.10°
C.20°
D.30°
A,B,C,D,依次是⊙O上的四个点,
=
=
,弦AB,CD的延长线交于P点,若∠ABD=60°,则∠P等于( )
AB |
CB |
CD |
A.40° | B.10° | C.20° | D.30° |
参考答案: