Question

How are the sixth, seventh, and eighth amendments similar?

Answer 1

They all deal with protecting the accused people in a court of law. 

Hope this helps, 

kwrob

Answer 2

What ever amendment does:

1) 6th amendment- This guarantees citizens the right to a public trial, the right to a lawyer, right to have a jury of their peers, and the right to know what charges are being put against you. All of these are imperative, as it gives each citizen equal treatment in the eyes of the law. 
2) 7th amendment- This guarantees a right to a civil trial in any case in which the object in question is valued at over $20. In this case, there would be a jury. This ensures that any damage to a person's property may be ruled on in court. 
3) 8th amendment- This protects citizens against excessive bail. This ensures that citizens are not held for an unfair amount of money. The crime dictates how much bail should be for the individual. 

Hope this helps! God bless
-vf