On Wednesday, May 3, 2017 at 8:50:05 PM UTC+3, bassam king karzeddin wrote:
> >
> >
> >
> > Le 19/07/05 12:37, dans
> > 4dd7d$42dcd769$d52f93dc$
25...@news.chello.at,
> > « Jutta Gut » <
gut.jutt...@chello.at> a écrit :
> >
> > >
> > > "bassam king karzeddin" <
bas...@ahu.edu.jo> schrieb
> > im Newsbeitrag
> > >
> > news:29354512.1121766911405.JavaMail.jakarta@nitrogen.
> > mathforum.org...
> > >> That is grate,
> > >>
> > >> This,might open doors to constructible polygons
> > >>
> > >> In fact,I have deduced & proved the same thing,I
> > have mentioned that here:
> > >>
> > >>
> >
http://mathforum.org/kb/message.jspa?messageID=3802920
> > &tstart=0
> > >>
> > >> I will provide examples soon.
> > >
> > > If I understand correctly, you have shown that in
> > an triangle with
> > > the sides a^3 , a*(b^2-a^2) , b*(b^2-2*a^2) one
> > angle is three times
> > > another one.
> > >
> > > The more interesting question would be: given an
> > angle, how to
> > > construct a triangle with the sides a^3 ,
> > a*(b^2-a^2) , b*(b^2-2*a^2)
> > > and the given angle?
> >
> > It tried for some simple angles: pi/8, pi/6, pi/5,
> > sides can be computed
> > with square roots. For pi/9, you have the 3rd degree
> > equation x^3=3*x+1.
> > Not surprising, since pi/9 is not constructible. But
> > it's still interesting
> > to know which triangles have two angles A,B such that
> > A=3*B.
> >
>
> That is because there is not any EXACT real root for the polynomial (x^3 - 3x -1 = 0), for sure, but nearly an approximated root, and that is why your in mind angle (Pi/9) is never an exact existing angle
>
> So, understanding that fiction unreal and nonexistent number as 2^{1/3} would immediately remove the complete puzzle about trisecting of the arbitrary angle
>
> And let us see what works that had been added by secretive researchers or Wikipedia writers? after that old date reference and what are the rules of this science forum or the rules of professional mathematicians to promote that old interesting issue raised by a mature only to the science community
>
> Regards
> Bassam King Karzeddin
> 3ed, May 2017
You have to understand well first the true meaning of the word arbitrary in maths, though mathematics doesn't define it correctly
An arbitrarily chosen distance or length or angle is an existing distance or length or angle (just before your big eyes), thus is constructible for sure (Did not you just construct it arbitrarily, also by the rules?) wonder!
So, to trisect any existing angle or any arbitrary angle just consider the following circle with arbitrary radius and center at point (C)
then chose any arbitrary two points at the circumference as (A & B)
So, you have a triangle (ABC), say CLOCKWISE
Bisect the angle (ABC), and let the bisector intersects the radius (CA) at point (D)
And let your assumed arbitrary angle be simply (CDB) clockwise, then the angle (DBC) is the exact trisection angle of your assumed arbitrary angle for sure
But, you will get completely confused whenever you assume (but cannot construct) in mind a fiction and nonexisting angle for angle CAB, that explained well enough in my posts
Even the Greeks who posed this OLDEST problem did not understand it the way I expose it here for you, and for sure
(c)
Regards
Bassam King Karzeddin
May 20, 2017