It is not known which was invented first because neither the viola nor the cello have exact dates of invention, or even exact years. Both instruments are traced back to the early 1500s. It is likely that they were invented around the same time.
the difference between cello and viola music is that cello sounds lower then viola
Andrea Amati invented the first cello around the year 1538.
Typically a string quartet is two violins, one viola, one cello.
The viola is both larger than the violin and smaller than the cello.
The cello.
cello
The classical string quartet has a first and second violin, a viola and a cello. It was formalized by Franz Josef Haydn and perfected by him and Mozart. Nearly every classical composer since their time has written at least one string quartet.
viola
The 'cello is larger than the viola, which is larger than the violin.
First violin, second violin, viola, cello.
Strange as it may seem, there are four (4) players. Almost always in this configuration: * 2 Violins * 1 Viola * 1 Cello
It was invented by Andreas Amati in the mid 1500's and evolved partially from the viola da Gambia.