A:58°
B:59°
C:60°
D:61°
The giant knocks the wall around his garden. ( )
如图:
(1)若4条直线两两相交于不同点,则对顶角、同位角、内错角、同旁内角各有几对?
(2)若n条直线两两相交于不同点,则对顶角、同位角、内错角、同旁内角各有几对?