(a) One point in common-

∠POQ and ∠ROS has one point in common i.e., O.

(b) Two points in common

∠AOB and ∠COB has two points in common i.e. O and B.

(c) Three points in common

∠POM and ∠LOM have three points in common i.e. O, M and N.

(d) Four points in common

∠EOB and ∠AOB have four points in common i.e. B, C, D and O.

(e) One ray in common.

∠LOM and ∠MON has one common ray i.e. OM.