Because the prefix 'deca' means ten. A decagon has ten sides - a decade is ten years.
YES! decade, decagon, decathlon, decathlete by the way , if there were no words that started with "deca-", then by definition, "deca-" would not be a prefix...
She has served as a nurse for an entire decade.
6-gon or a six sided shape
Greek word dekas meaning 'group of ten'
Decade is prounonced Deck aid or if you visit dictionary.com they have a sound bite that will allow you to hear it pronounced DECK-aid
decade
decade
decade decagon decadent decimal decathlon
Decade, decimal, decagon, decathlon.
i believe it would be called a decagon. the prefix "deca" meaning ten, as in decade (10 yrs)
A decagon~Like decade means ten years;)
Decade, Decagon and Decatron
Decagon-A triangle with 10 side Decade-10 years Decagram-10 grams Since it is a prefix, you can add deca to a lot of words and it will always be 10 (units) of whatever that word is.
Did you mean decagon? You misspelled the word. A decagon is a shape with 10 sides
decimal, December [ originally the 10th month in the Roman calendar ], decagon, decare and decahedron
A decagon has ten sides - from the Greek word 'deka' meaning ten.
decimal, decimeter, decade, decagon, decanter, decapitate, decay, deceit, December, deceptive