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October 15th, 2018, 02:34 AM   #1
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What is the meaning of "Centrisigmal measure"?

Centrisigmal measure

Here are the details of the measures:
Full revolution = $900^0$
Right angle = $100^0$
1g = 100’
10’ = 100’’

What is the correct spelling of "Centrisigmal measure"?

Last edited by Ganesh Ujwal; October 15th, 2018 at 02:37 AM.
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October 15th, 2018, 03:10 AM   #2
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The correct spelling is "centesimal". It means divided into hundredths (or relating to division into hundredths).

If a right angle is 100 centesimal degrees, a full revolution would have to be 400 centesimal degrees.
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October 15th, 2018, 03:19 AM   #3
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How to understand this two lines?

1g = 100’
10’ = 100’’

What does "g" indicates?
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October 15th, 2018, 04:20 AM   #4
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A centesimal degree is also known as a gradian, sometimes abbreviated to grad. Where confusion with other uses of g wouldn't arise, gradian could be abbreviated to g, though I haven't seen this done.

However, 1 grad can be written as 1$^g\!$.

In centesimal angular measure, 1' = 100'' (so 10' = 1000'').
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October 15th, 2018, 05:33 AM   #5
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Quote:
Originally Posted by skipjack View Post

In centesimal angular measure, 1' = 100'' (so 10' = 1000'').
what does ' means in 1'?
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October 15th, 2018, 08:26 AM   #6
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1' = 100'' means 1 minute (of arc) = 100 seconds (of arc). In this context, these are centesimal minutes and centesimal seconds. In the "normal" context, the same symbols would still mean minutes and seconds, but there would be 60 seconds per minute and 60 minutes per degree.
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October 16th, 2018, 08:51 AM   #7
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Quote:
Originally Posted by skipjack View Post
1' = 100'' means 1 minute (of arc) = 100 seconds
Why time units came in circular type question?
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October 16th, 2018, 10:21 AM   #8
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Presumably because they were originally words used for small amounts of various things, not just time.
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