(i) ∠1 and ∠7, ∠4 and ∠6 are pair of alternate angles.
(ii) ∠2 and ∠8, ∠3 and ∠5 are pair of alternate angles.
(iii) ∠1 and ∠5, ∠2 and ∠6, ∠4 and ∠8, ∠3 and ∠7 are pair of corresponding angles.
(iv) ∠1 and ∠6, ∠4 and ∠7 are pair of interior angles on same side of transversal.