100 years, or a century.
No, you don't need a hyphen. It would be 10 decades or ten decades.
Ten decades is one century.
Because... there are ten years in a decade - therefore there are ten decades in a century ! The prefix 'dec' means ten.
The answer is decades.
Ten
Its 10. 10 decades = 1 century.
Ten decades.
It is called : Decades.
Ten
Ten year increments are called decades. *
Decades is a Greak word. (δεκάδες) It means ''ten of something''. If you want to say 'ten years'' its ''decaetia'' , the prefix deca- meaning ten and -etos meaning year.
A decade is ten years. a millennium is 1000. There are 100 decades in a millennium.