ȥȥ
ջѷ̤ΣȤ߹碌ȣդǤޤ
ʼ˸лԡ 921ڡ 0:05:57 MAIL:h-sakai@zb3.so-net.ne.jp 28270
ޥ
ϡʤ⡩ˡԽǥߥޥ...

빽֤򤫤ƹͤΤˡ󤼤ꤤ꤬褺ɺǽ˺äơʤפȤͳǥܥĤˤꤷƤޤä...ȤȤˤʤäƤޤޤ...OTL
PowerBook G4 921ڡ 0:07:44 MAIL:masaru-y@sansu.org HomePage:28271
㡼ߡ @ ²
ѴؿȤäŻǤǤɤ򤯤Τ
ޤŽ碌Τʡ
921ڡ 0:08:44 28272
fumio
Фϡ
921ڡ 0:09:28 28273
mhayashi
ŸޤȬѷޤ
921ڡ 0:10:32 HomePage:M.Hayashi's Web Site28274
fumio
գʬʡ
921ڡ 0:10:35 28275
ݤ
ĺѤѤɤߴְ㤨Ƥޤ
äѤꤪϼǼ
äѤ餤ŷ񡡡 921ڡ 0:11:06 MAIL:hopes@mba.ocn.ne.jp HomePage:HOPES褤Ȥ٤Ϥ28276
ߥƥ
BC2a, ȡ67.5Ȥơa1/tan.
äơ
16(1/2 * 2a * a tan) 2 * (2a)^2
򤴤ˤ礴ˤȡ
921ڡ 0:11:50 28277
ޥ
#28277
⤽ʴǸޤ㡼ߡΤ褦˰ŻDz򤯡ȤΤ̵Ǥ..
PowerBook G4 921ڡ 0:15:05 MAIL:masaru-y@sansu.org HomePage:28278
ޤ륱
ĤΣջѷ;ˡ
ˤη֤褦ˤƣĤΣջѷ¤٤ѷޤ
ޤƤߤ顢ʤɤߤŨǤ
921ڡ 0:32:38 MAIL:take4310@mobile.email.ne.jp HomePage:ޤ륱28279
rootx
ѴؿޤäƤʤΤǡʤǤޤ
921ڡ 0:35:56 28280
CRYING DOLPHIN
Ϥʲꤽ͡
http://www7a.biglobe.ne.jp/~cdcdcd/518921-halfhalf.GIF
޷ѥȤƤϤʤʤ򤤤Ȼפա
921ڡ 0:45:12 HomePage:ȤƻȤ28281
y.kobayashi
¦̤λѷѷǤ褦¤٤ʣߣ˼ޤ
̤гǣʬΤ򢬤ΤޤƤ
ȡ礦ޤäƣߣĤǤ롣
äƣߣ᣸ĤǤäƤ뤫ɤ
921ڡ 5:55:23 28284
ȤޤԤ
̤8tan(/8{2+tan(/8}ɽ롣
ȾѤθtan^2(/8= {1-cos(/4)}/{1+cos(/4)} ǤΤ
tan^2(/8= ʢ2-1)^2 tan(/8= 2-1
ơͤϣ
921ڡ 6:45:40 28287
⡼ޥ
դxȤȡΤx^2+8x
ջѷμդaȤȡa*a/2=1*x,(x/2)^2+1=a^2 ΩĤΤǡx^2+4=42*x 顢x=22-2 (<1)
Ĥޤꡢ2x^2+8x=2x(x+4)=2(22-2)(22+2)=2*4=8
921ڡ 8:12:55 28288
ϥ饮㡼ƥ
Ϥ褦ޤѴؿǤ
921ڡ 8:50:58 HomePage:湩ؤĩ28289
uchinyan
ϤˤϡǶϡī˻ʤäƤޤäơä٤쵤̣Ǥ
ƺǤ򸫤ʤǡɽѤΤȻפäơʤǺǤޤޤ (^^;

ʤȤ⤢äơޤɽѤͤƸޤ
ɽ̤ϡŸޤƤߤФʬޤϡȬѷˤʤޤ
ȬѷդĤ˱ĹƤȡǤޤΰդ 2cmѤ 4cm2 Ǥ
ȬѷѤϡͶľջѷͤĤФǤ
ľջѷѤϡ1/4 * (Ȭѷΰ)^2 ʤΤǡȬѷѤϡ4 - (Ȭѷΰ)^2 ˤʤޤ
ǡ(Ȭѷΰ)^2 ɤˤ⻻ǵޤʤäΤǤɤ֤ơʤ
ǡͤޤ
¦̤ϡۤɤȬѷȾʬǤơ̤ϡȬѷΰդդȤǤ
äơɽѤϡ2 - 1/2 * (Ȭѷΰ)^2 + (Ȭѷΰ)^2 ˤʤޤ
ΤϡġĤɽѤǤ顢­ȡ
2 * (2 - 1/2 * (Ȭѷΰ)^2 + (Ȭѷΰ)^2) + (4 - (Ȭѷΰ)^2)
= 4 - (Ȭѷΰ)^2 + 2 * (Ȭѷΰ)^2 + 4 - (Ȭѷΰ)^2
= 8 cm^2
ˤʤޤ󡢤η׻ϡȤƤϡʸǤϤʤ޷ǹԤޤ

μϡȤ⡢ѥΤ褦ʴǤ͡
ͥνȡ 921ڡ 15:27:03 MAIL:uchi@sco.bekkoame.ne.jp 28290
Shingo
ͳѤŸޤ񤤤ơĺ֤
#28281ˤ褦ʿޤǤޤ

οޤѤcm^2Ȥ

Ĥɽѡءܡ̤
Ĥɽѡءݡ̤

ȤʤޤĤޤꡢܥᣲؤȤʤޤ
ء4cm^2ʤΤǡ8cm^2Ȥʤޤ

ǽ黰ѴؿȤȤפޤDz򤱤ϰϤʤΤ
ޤ(^_^;
921ڡ 12:38:56 28291
uchinyan
Ǽɤߤޤ
Ūˤ礷ѤʤΤǤ٤Хꥨ¿褦Ǥ

ɡ
#28270
ջѷ̤ΣȤ߹碌ȣդǤޤ
ͤȡ줬ʹͤ⤷ޤ

#28274
#28290ƱʡȤ⡢#28279ʡ

#28275
գʬʡ
Ǥ͡ɤäѷݥȡ
#28281ƱǤ礦Ȥ#28290ο޷Ū

#28279
ʤۤɡѷ⤢ǤȬѷäϤɤΤʡϤꤽǤ

#28281
ʤۤɡѷ⤢ޤͤ͡ȡ⼫Ǥ礦

#28284
#28290ο޷ŪƱǤ

#28290
βˡ
ʤο޷Ūʲϡ
äȬѷˡ̤ͤĤľջѷʬ䤷äĤơ 2cm 롣
Ѥϡܡ
Ȥޤ

#28291
Ūˤϡ#28281ƱǤ򡢻#28290Τ褦ˡ׻Ū˽Ƥޤ͡
ޤʤ֤Ȥơ˰ɼ (^^;

Ѵؿɡ
#28272
仰ѴؿȤäŻǤ
ˤϤäȤĤʤ
̤ΰդ 2a cm ȤС
a = tan(22.5)
a^2 = (tan(22.5))^2 = (1 - cos(45))/(1 + cos(45)) = (sqrt(2) - 1)/(sqrt(2) + 1) = (sqrt(2) - 1)^2 = 3 - 2 * sqrt(2)
a = sqrt(2) - 1 > 0
ʤΤǡѤϡ
16 * 1/2 * 1 * 2a + 2 * (2a)^2 = 16a + 8 * a^2 = 24 - 16 = 8 cm^2
ɡ
#28278
⤽ʴǸޤ㡼ߡΤ褦˰ŻDz򤯡ȤΤ̵Ǥ..
ƱǤ ^^;

#28277
ɤϡ#28272ؤΥȤƱǤ͡

#28287
#28272ؤΥȤƱ

#28289
ŪʲˡʤΤǤ֡

ʿɡ
#28288
󡢾Ѥʵ¿ʬñʤǤ礦ή˽񤭤ʤƤߤȡ
¦̤ջѷդĹ x ȤȡѤ 2 * x^2 + 8 * x Ǥ
ǡջѷդĹ a Ȥȡ
ջѷѤ顢1/2 * a * a * sin(45) = 1/2 * 1 * x ǡ1/sqrt(2) * a^2 = x
ջѷդˤ뻰ʿ顢(x/2)^2 + 1 = a^2
ΩĤΤǡa õơ
x^2 + 4 = 4 * sqrt(2) * x
x^2 - 4 * sqrt(2) * x + 4 = 0
0 < x/2 < 1, 0 < x < 2 ʤΤǡ
x = 2 * sqrt(2) - sqrt((2 * sqrt(2))^2 - 4) = 2 * (sqrt(2) - 1) < 2
ǡ
= 2 * x^2 + 8 * x = 2 * x * (x + 4) = 2 * 2 * (sqrt(2) - 1) * 2 * (sqrt(2) + 1) = 8 cm^2
ʡ
ͥνȡ 921ڡ 13:44:53 MAIL:uchi@sco.bekkoame.ne.jp 28292
ޤ륱
ꡢ޷ĤʬƤΤˤΤǡäĤƤߤޤ
http://www.ne.jp/asahi/room/maruken/sansu/fig/v1_518.gif
ä硩
921ڡ 14:08:04 MAIL:take4310@mobile.email.ne.jp HomePage:ޤ륱28293
ޥ
#28293
ޤäˤɤä...Orz
PowerBook G4 921ڡ 14:44:33 MAIL:masaru-y@sansu.org HomePage:28294
uchinyan
#28293
ʤۤɡä顢Τ褦ʤХ⤷ʤƺѤष (^^;
ΩΤ򤽤Τޤ޽ФΤǤϤʤȤ߾夲褦˺ꤷ顢빽񤷤ˤʤ뤫⤷ޤ͡
ͥνȡ 921ڡ 15:20:33 MAIL:uchi@sco.bekkoame.ne.jp 28295
⡼ޥ
#28292 uchinyanء
a*a/2 ϸǤOrZ
2*a^2 Ǥ
ջѷ򣲸¤٤ƤǤ޷ѤǤǤ
sin45ȤʤȤǤ(^^;
921ڡ 15:30:08 28296

2ʬʤʬäΤĩ郎᤯ää餹åǤ̤ˤ줿Ȼפޤ
921ڡ 18:07:58 28297

ѤʤͳѤǹͤȣϣˤʤޤ¦̤ϣĤ뤫飳ǣĤ꤬ˤʤꡢäοȤϣˤʤޤĤޤ겼ΣãĤĹʤɤǤƱˤϣѤȤʤޤᣰʣĤѡˡΣܤĤλѿɽѤˤʤʣإۥ˥ĤȥȤ߹碌ʥΣܡˤ饢Σܤˤʤ롣
äƣ᣸ˤʤ롣
921ڡ 18:32:22 28298

ɤʤƱȻפޤ¤٤Ǥ

¦̤ջѷĺѤäĤ褦¤٤
Ȭѷ롣
ȬѷդˡĤˡ̤г
ʬľѻѷ򤯤äĤ롣
Сդν夬ꡣ

ջѷ硢礢ΤǡĤǤ롣

921ڡ 21:19:01 28299
LL
ʤʤää
http://siced.hp.infoseek.co.jp/sansu.png
921ڡ 21:21:54 28300
uchinyan
#28298
褯ʬʤ

#28299, #28300
ɤդ뤫ɤɽ뤫κϤޤͤϡ#28290ƱǤ͡
#28292⤴͡
ͥνȡ 921ڡ 22:15:35 MAIL:uchi@sco.bekkoame.ne.jp 28301
ߤγ
Ϻǽ28279ޤ륱󤵤Ʊޤ񤭤ޤäįƤȰգcmĤꡢθ28281GRYNGηˤʤޤʤ龮ǤǤޤ͡

ʼ˸ 922ʶ 0:24:19 28302
粬ҹ
ϥѥΤ褦Ǥʡ˻Ҷ˽ꤷƤɤ⤷ޤ󡣣ȤĹФƤΤǤ򲿤Ȥդˤʤȹ碌ƤޤɣդĤǤ
ߣߣ᣸
ϤʴDz򤭤ޤʤʤ򤫤äǤ
922ʶ 11:58:47 MAIL:toshi009@land.hokuriku.ne.jp 28304

롰ʣᣱˡᣱ/ܣ*ܣܣ/*ܣ/*ݣܡġ³
̲줿ǤϽ񤤤ƤäɤǤäƤΤȤäƤ׻ΤϽΣǤ

922ʶ 21:08:53 28307