They all start with the prefix de- and mean something to do with the value of the number 10.
Decimal: Counting system based on number 10
Decagon: A polygon with 10 sides and angles
Decade: A period of 10 years
Decathlon: Competition in which an athlete competes in 10 events
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All of these words are related to the number 10. "Decimal" refers to a number system based on powers of 10, "decagon" is a polygon with 10 sides, "decade" is a period of 10 years, and "decathlon" is an athletic event comprising 10 different Track and Field events.
The words "decimal," "decagon," "decade," and "decathlon" all share the common prefix "deca-," which is derived from the Greek word for "ten." This prefix signifies that each of these words is related to the number ten in some way. "Decimal" refers to a number system based on powers of ten, "decagon" is a polygon with ten sides, "decade" represents a period of ten years, and "decathlon" is an athletic event comprising ten different track and field competitions.
Decade, decimal, decagon, decathlon.
A decagon has the same prefix as a decimeter, which is "deca-". Both terms indicate a quantity of ten.
The Latin root "dec" means "ten." It is often used in words related to the number ten, such as decimal, decade, decathlon.
Decade is a noun
The metric prefix for 10 to the ninth power is "giga." It is abbreviated as "G" and represents one billion.