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  1. 26th December 2015, 10:12 AM #46
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    Quote Originally Posted by artme View Post
    A long way from maths for woodies and expanding/contracting / questionable fuel supplies.!1

    Have to divide a section of timber into equal parts. I can do it without a ruler. Who else can do this??
    With a piece of paper even thirds can be done easy. Can i use paper?

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  2. 26th December 2015 10:12 AM # ADS
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  3. 26th December 2015, 10:24 AM #47
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    Quote Originally Posted by DaveTTC View Post
    Thirds with a compass i think. Does that count

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    Pretty sure that was impossible. Avvagoyamug
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  4. 26th December 2015, 10:26 AM #48
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    Are we talking rund stock or square

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  5. 26th December 2015, 10:26 AM #49
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    Quote Originally Posted by DaveTTC View Post
    Are we talking rund stock or square

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    Length.
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  6. 26th December 2015, 10:27 AM #50
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    Long piece of paper

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  7. 26th December 2015, 10:28 AM #51
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    Oh, and not Trial & Error.........
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  8. 26th December 2015, 10:37 AM #52
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    A sector and dividers?
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  9. 26th December 2015, 10:59 AM #53
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    Quote Originally Posted by A Duke View Post
    A sector and dividers?

    I think it was anything but a rule, calculator, computer or similar. Drawing instruments are fine.
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  10. 26th December 2015, 03:29 PM #54
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    Quote Originally Posted by FenceFurniture View Post
    There was a thread a while ago about dividing into thirds - pretty sure that nobody came up with a solution. Halves, quarters - no problem.
    that thread was about sub-dividing an angle into three equal angles -- not possible with a compass and straight edge.

    dividing a straight line (a board's width or length) into thirds, see
    https://www.mathsisfun.com/geometry/...-segment3.html
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  11. 26th December 2015, 06:00 PM #55
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    Quote Originally Posted by ian View Post
    that thread was about sub-dividing an angle into three equal angles -- not possible with a compass and straight edge.

    dividing a straight line (a board's width or length) into thirds, see
    https://www.mathsisfun.com/geometry/...-segment3.html
    Ah, yes, I remember now.
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  12. 26th December 2015, 06:10 PM #56
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    Quote Originally Posted by FenceFurniture View Post
    Oh, and not Trial & Error.........
    Mathematicians never use trial & error. However, the method of successive approximations is acceptable.
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  13. 26th December 2015, 07:35 PM #57
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    Sorry fellas, should have mentioned it was to divide a length into equal parts.

    Easily done with a pair of compasses ( Pedantic me!! )a straight edge and a set square.

    Know good way to get an accurate right angle?
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  14. 26th December 2015, 07:38 PM #58
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    Right angle with a straight line and compass. No problem

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  15. 26th December 2015, 08:39 PM #59
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    Right angle using a sheet of (A4) paper?
    I often use a sheet of paper on-screen to check right angles.
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  16. 27th December 2015, 08:13 AM #60
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    Quote Originally Posted by Blocklayer View Post
    Right angle using a sheet of (A4) paper?
    I often use a sheet of paper on-screen to check right angles.
    Getting close!!!
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