٥륯åĥ
ѷ£äȻѷϣäϹƱʤΤ޳ѷΤҤȤĤѤƱ
1803605108108٤Ǥ
510ڡ 0:04:03 47239
鯤ο
ʿ̿޷Ǥ͡
510ڡ 0:03:23 47240
Mr.ǥ
٥륯åĥ#47239
ޤäƱ褦˹ͤޤ
510ڡ 0:07:27 47241
ǯ
ѤȳѤְ㤨
510ڡ 0:17:36 47242
fumio
פ֤Ǥ
2018ǯ١奪եߡ֡׳ڤߤˤƤޤ
510ڡ 0:18:45 47243
Ȥ
դĹ1Ȥ
ABC;
AC=sqrt(2-2*cos(108))=sqrt(2-(1-sqrt(5))/2)=sqrt(3+sqrt(5))/sqrt(2)
=sqrt(6+2*sqrt(5))/2=(sqrt(5)+1)/2
OAC;
(6+2*sqrt(5))/4=(3+sqrt(5))/2=2-2*cos(AOC) ѷ
3+sqrt(5)=4-4*cos(AOC) ѷ
cos(AOC)=(1-sqrt(5))/4 AOC=108롦()
˭ԡ 510ڡ 0:32:46 MAIL:fttnm528@ybb.ne.jp 47244
TRPG
̥į᤿ʬޤ
510ڡ 0:39:00 47245
TRPG
̥į᤿ʬޤ
510ڡ 0:40:57 47246
ߤ
դ򣱤Ȥȡѷϣäϡ֣դĹ⤦դáפȤʤ롣
ѷϣáỰѷ£äʤΤǡѣϣáѣ£áʤ
޳ѷѤƱ٤Ȥʤ롣

פ#47239ʥ٥륯åĥˤƱǤ
510ڡ 1:14:04 47247
ˤ
AOC=ABC
ä޳ѷѤ108Ǥ
Ķļˡ 510ڡ 6:08:27 47248
ֿء׾ι
Ʊʻѷ򸫤Ĥޤ
510ڡ 6:08:42 47249
ˤ⡼
£âᢤã

510ڡ 21:24:27 47250
ޤ
#47246 TRPGȤ
Τˡ

https://amzn.to/2rxFyeq
somewhere in the world 510ڡ 21:40:08 47251
tamachan
޳ѷƤ򤱤ޤ
511ʶ 17:25:30 47252
Ф
˰פǤ礦
г1ܰƻѷιƱǽ
512ڡ 23:46:29 47253
Ф
ϰפäʿͤ뤫⤷ʤʤΤϤ

դ8ѷ£ãģţƣǣȤ롣CDäEFŤGHǤAB֤ȿǤ롣1դĹѤʤ
513 11:14:01 47254

ñǤ
513 17:15:28 MAIL: 47255
Ѥ
޳ѷ񤤤ƤˤǤ鸫ޤ()
515ʲС 8:09:28 47256
Ȥ
#47254

ߤޤ˥롼ȤΤǤ

45դ12ջѷ1դsqrt(2*sqrt(2)+4)/4
ɸA(sqrt(2*sqrt(2)+4)/4,0)Ȥ
Ȭѷ濴(0,0)Ȥ
줾濴Ȥ뤽줾Ĺsqrt(2*sqrt(2)+4)/4,1θȤ
(sqrt(sqrt(2)+2)/2,sqrt(sqrt(2)+2)/2)줬٤礦BȤ
ABȤG(0,-sqrt(2*sqrt(2)+4)/4)̤ľ(e1)
ľȷƱҤC(0,sqrt(2*sqrt(2)+4)/4)̤ľ(e2)
2ľľ򤷤A̤ľ(e3)
e1e3θ
x=(3*sqrt(2^(3/2)+4)+2*sqrt(sqrt(2)+2))/12
y=sqrt(2^(3/2)+4)/12
e2e3θ
x=-sqrt(2^(3/2)+4)/12
y=(3*sqrt(2^(3/2)+4)+2*sqrt(sqrt(2)+2))/12
2ǻʿǡ
(sqrt(3)+sqrt(6))/3(1դĹ)
2(2*sqrt(2)+3)/3(Ѥ)
˭ԡ 515ʲС 20:25:30 47257
Ϣ
졩ޤ͡ϵ٤(^^;
517ڡ 0:03:51 47258