while seconds/minutes /degree are set on 60 scale unit intervals, why are milimeter, centimerter...etc are in?

Question

100 unit scale...makeing people confused

Answer 1

The origins of our current measurement system go back to the Sumerian civilization of approximately 2000 BC. This is known as the Sumerian Sexagesimal System based on the number 60. 60 seconds in a minute, 60 minutes in an hour - and possibly a calendar with 360 (60x6) days in a year (with a few more days added on). Twelve also features prominently, with roughly 12 hours of day and 12 of night, and roughly 12 months in a year (especially in a 360 day year).

Whereas the decimal (base ten or occasionally denary) numeral system has ten as its base. It is the most widely used numeral system, perhaps because humans have four fingers and a thumb on each hand, giving a total of ten digits over both hands.
Decimal system is to-days system.

Today we use the SI system .
millimeter,centimeter are units with suitable prefixes and are derivatives of the unit METRE.
Since these units have a history of development during the decimal number system era ,they are related by powers of ten.

Hope its sufficient to convince you.

Answer 2

Hmmm... Making people confused....

Does that confuse you?

Metric system:
http://en.wikipedia.org/wiki/Metric_system

SI Units:
http://en.wikipedia.org/wiki/SI#Units

I hope this assists you in overcoming your... confusion.