A B C D E represent the subjects
A+A1
A+B2
A+C3
A+D4
A+E5
B+B6
B+C7
B+D8
B+E9
C+C10
C+D11
C+E12
D+D13
D+E14
E+E15
15 combos
5/3.14= 1.592
= 1.59
The formula to find the circumference is C= pi(d)
So to find the diameter if you have the circumference is to do the circumference divided by pi
I hope this helps
Answer: 15
Step-by-step explanation: 75 divided by 5 = 15
Hope this helps!