Question

Lines which are parallel to the same line are parallel to each other ​

Answer 1

Answer:

⇒AB∥EFand

⇒CD∥EF

toproveAB∥CD

⇒∠1=∠3(correspondingangles)

⇒CD∥EF

⇒∠2=∠3(correspondingangles)

⇒∠1=∠2

henceAB∥CD

hope it help..