i) Points : A, B, and C
Line segments : ¯¯¯¯¯¯¯¯AB, ¯¯¯¯¯¯¯¯BC and ¯¯¯¯¯¯¯¯CA
ii) Points A, B, C and D
Line segments : ¯¯¯¯¯¯¯¯AB, ¯¯¯¯¯¯¯¯BC, ¯¯¯¯¯¯¯¯¯CD and ¯¯¯¯¯¯¯¯¯DA
iii) Points A,B, C, D and E
Line segments : ¯¯¯¯¯¯¯¯AB, ¯¯¯¯¯¯¯¯BC, ¯¯¯¯¯¯¯¯¯CD, ¯¯¯¯¯¯¯¯¯DE and ¯¯¯¯¯¯¯¯EA.
iv) Points A, B, C, D, E and F
Line segments : ¯¯¯¯¯¯¯¯AB, ¯¯¯¯¯¯¯¯¯CD and ¯¯¯¯¯¯¯¯EF.