My husband is a carpenter and I posed the question to him, he didn't know. There HAS to be thirds even if they aren't marked. So, why aren't they on tape measures?
2006-12-19 00:41:22 · 12 answers · asked by Hillaryforpresident 5 in Science & Mathematics ➔ Mathematics
One third is an odd number.
If you examine a measuring tape (or ruler) you will notice that there are only marks that can be evenly divided. Each mark is 1/2 of the size of the previous mark. For example the largest marks at each inch. The next smallest is at 1/2 inch, the next at 1/4, the next at 1/8, the next at 1/16. I don't recall seeing a mearsuring tape nor ruler with increments smaller than 1/16.
So let's address your concern about 1/3 marks. 1/3 of an inch will fall roughly at a point between 5/16 and 6/16 (3/8). I determined this by dividing the smallest increment on the tape (16) by 3 and came out with 5.33. Now the difference between 5/16 and 6/16 is minute and if that truly is the point to measure then a point 1/2 between the 5/16 and 6/16 would be easily marked and/or viewed. Thus the margin for error is even smaller.
Hope this answers the question!
2006-12-19 00:57:25 · answer #1 · answered by wrkey 5 · 1⤊ 0⤋
3 Inch Ruler
2016-10-21 09:47:23 · answer #2 · answered by kawamura 4 · 0⤊ 0⤋
As the first person said, 1/3 is a repeating decimal & as such, can not be represented on any ruler. However,
1/3 = 0.33333....3, [3's continue infinitely many times.]
Notice: all the fractions: 1/2, 1/4, 1/8 & 1/16, convert to finite decimals, they end.
2006-12-19 02:57:06 · answer #3 · answered by S. B. 6 · 0⤊ 1⤋
The type of measuring tape that is used for carpentry doesn't require 3rds. 1/32 of an inch is sufficient accuracy to do any carpenter work. Surveyors use special tapes that don't use inches at all. Surveyors' tapes have each foot divided into tenths, hundredths and thousandths of a foot. This makes mathematical operations simpler.
2006-12-19 01:57:07 · answer #4 · answered by Anonymous · 1⤊ 0⤋
This Site Might Help You.
RE:
Why are there no thirds on measuring tapes or rulers?
My husband is a carpenter and I posed the question to him, he didn't know. There HAS to be thirds even if they aren't marked. So, why aren't they on tape measures?
2015-08-06 05:03:25 · answer #5 · answered by Anonymous · 0⤊ 0⤋
thirds measuring tapes rulers
2016-01-31 04:57:58 · answer #6 · answered by Anonymous · 0⤊ 0⤋
One Third Of An Inch
2016-12-31 03:52:21 · answer #7 · answered by Erika 4 · 0⤊ 0⤋
For the best answers, search on this site https://shorturl.im/avxjF
sin(a/2) * PCD = measured distance where a = the angle of segment formed by the holes and the centre of the flange. Solve for PCD and take the average for each of the 4 measurements to get the most accurate answer because any real measurement will be slightly innacurate.
2016-04-03 02:10:34 · answer #8 · answered by Anonymous · 0⤊ 0⤋
Convention. Some engineering rulers do have 30ths of an inch for scale drawings.
2006-12-19 01:07:00 · answer #9 · answered by novangelis 7 · 1⤊ 0⤋
They're just not commonly used in construction. But then, neither are 5'ths or 7'ths ☺
Doug
2006-12-19 00:46:35 · answer #10 · answered by doug_donaghue 7 · 0⤊ 0⤋