Question

2. By paper cutting and pasting, prove that pairs of corresponding angles are always
equal in parallel lines.
in register 3​

Answer 1

l and m are parallel lines

n is transversal line 

Then the corresponding angles

∠1=∠5

∠2=∠6

∠3=∠7

∠4=∠8

If two parallel lines are intersected by a transversal, then pairs of alternate interior angles are Equal.