Joke Collection Website - Talk about mood - The third question is about your solution.

The third question is about your solution.

choose one

Solution:

Fold, then ∠ 1=∠2.

∠ 1=∠3 according to the parallel offset angle.

∴∠ 1=∠2=∠3

∵∠2+∠3= 130? (outer corner)

∴2∠ 1= 130?

∴∠ 1=65?