72. Write down each pair of adjacent angles shown in the following figures:
(i) ∠AOB, ∠BOC; ∠BOC, ∠COD; ∠AOB, ∠BOD; ∠AOC, ∠COD
(ii) ∠PQR, ∠PQT; ∠SPR, ∠RPQ; ∠PRQ, ∠QRU
(iii) ∠TSV, ∠VSU; ∠SVU, ∠SVT
(iv) ∠AOC, ∠AOD; ∠AOD, ∠BOD; ∠BOD, ∠BOC; ∠BOC, ∠AOC
Adjacent angles share a common vertex and a common arm. By observation, the above pairs are listed from the given figures.