Taro
112cmΩΤ˻ѿϤᤳ餹ʤ򤱤ޤ
ľ塡 84ڡ 0:08:45 25565

ΤΩΤƤϤ3:4:5ľѻѷͤȡ
ߤľ15cmαߤǤ뤳Ȥʬޤ

Ϣ³̡Ǥ⡢ϻΤΤǤ⤢Τʡ
̤̪ 84ڡ 0:10:57 MAIL:ishizaki@qa.so-net.ne.jp 25566
ޥ
ϡ轵ΥߥΤȤ⤢äΤǡ̵פˤƤޤޤ졢֣ͣΤ򼴤˲žȤѡפߤʤΤǡ⹻ؤǤ褯ʡˤޤ...ʤȹ⣲ǶƤޤ...
PowerBook G4 84ڡ 0:13:28 MAIL:masaru-y@sansu.org HomePage:25567
DrK
ϼԤޤ
ߤľ¤Ϥ˵줿ΤǤ߼Ψ򤽤Τޤ޳ݤƤޤޤ
ϳڱफ?㤦ʡ 84ڡ 0:21:46 MAIL:satoka@star.odn.ne.jp 25568

뤤פ֤Ǥ
ȡ饹˺Ƕᶽ̣Ǥ
84ڡ 0:29:44 25569
ҡΤ
ޤäϤɤä...
3ʿȤäƽФ䤬ϼߤʾС
ʬʿФƤΤǤ˱
9ߤ濴 84ڡ 0:37:35 HomePage:25570
ʤ
գΩΤˤϤ᤿
http://www3.sansu.org/tables/san0804_6754.gif
λѷޤ
̳ƻ 84ڡ 1:00:42 MAIL:naka@sansu.org HomePage:naka's Home Page25571
ġ
Ǥ
84ڡ 5:43:07 25572
kasama
Ϥ褦ޤޤȤʤǤϤޤ󤬡ǼǤޤ(^_^;)

äȡMNĹ2*rȤȡΤΰդĹ22*rǤľŪ(ʤƸܤ줽Ǥ)žΤѤ̤ι⤵󼡴ؿʤΤǡδؿf(x)=a*x^2+b*x+cȤơ
f(0)=*(2*r)^2f(r)=*r^2f(2*r)=*(2*r)^2
򤯤ȡa=Сb=-12*Сc=72*ФȤʤޤơ
f(10+1/2)=225/4*
Ǥ(*^_^*)
84ڡ 9:58:32 25573
uchinyan
ʤȤϤ褦ޤʤǤϴԡ
ǽ顢10.5 cm ڤäߤȾ¤򴪰㤤Ƥꡢ
˵դϡפ鷺ʿȤäƤޤޤ
ϡǼǤ򸫤ٶޤ
ͥνȡ 84ڡ 9:40:33 MAIL:uchi@sco.bekkoame.ne.jp 25574
ޥ
ޤäѤǤϤʤƼĹˤ٤Ǥ...ʤȤˤʤä꤬ѷ׻äΤǤĤ...
PowerBook G4 84ڡ 10:22:49 MAIL:masaru-y@sansu.org HomePage:25575
uchinyan
ǼĤɤߤޤ
ĤΤȤǤʤοޤͤˤʤޤ
⡢ 12cm ΩΤΤϤ˵դΤǤ
īιӤǤ⤢(Ȱ餱ˤ ^^;)345 ˤϵդޤǤ
ʤСΤ˻Ǥ͡
345 Dz򤫤줿Ǥ
⡢줿ޥ뤵ϡäѡʤ
ͥνȡ 84ڡ 11:28:43 MAIL:uchi@sco.bekkoame.ne.jp 25576
ϥ饮㡼ƥ
Ĥ¾οͤ򤭤ޤ
̶彣 84ڡ 13:41:06 HomePage:ĩ25577

գΩΤߡι⤵ڤ롣ȡȣʬ줿̤ĹȤʤʤʬʡˡгߤľ¤Ȥʤ롣줬ݣ᣹ȣľѻѷμդǣߣߣ=
84ڡ 21:12:00 25578
סϺ
ΩΤƤϤơ夫鸫ޤȣɽơαߤѤȡϤä򤱤ޤ
84ڡ 23:36:07 25579

ʤߤˡͣΤDzžȤѤ빽ñ˽Фޤ͡
ͣΤȰդȤεΥΣʿѤϡ󼡴ؿʬǣ+ࣳᣲߣߣ=
85ʶ 9:06:15 25580
ϲ
פ֤˲򤤤Ƥߤޤ
85ʶ 9:20:10 25581
X
ǤƤƥġ꡼Dz򤭤ޤåץޥåʤɡƵ٤ʸФͷӤۤƤޤʸвֲƤξƤȺʤˤΤäƸо夫ߤޤڤ߳ڤߡ
88ʷ 10:14:33 25582
Ȥ
٤ʤޤ(2Υޥɤǽ񤳤Ȥꤷ)
ʲʬʤβǤ(ѤʬǵȤޤ)
褺դο1Τ1դ뤳Ȥˤ
1դxȤ
ΤʬMNޤʿ̤2ʬ3դĹ
sqrt(3)*x/2,sqrt(3)*x/2,x2ջѷǤ
򤵤ʬMN3դĹ
x/2,sqrt(3)*x/2,12ľѻѷǤʿȤ򤯤
solve((x/2)^2+12^2=(sqrt(3)*x/2)^2,x);x=12*SQRT(2)
ʬMNzȤƿ1ֺɸˤȤˤ
N(0,0,0),M(0,0,12)ޤΤM,NξäƤʤ4ܤ
zžƱ̤1ܤκɸ(줾A,BȤ)ͤФ褯
A(6*SQRT(2),0,0),B(0,-6*SQRT(2),12) 2̤ľ
(x-6*SQRT(2))/(0-6*SQRT(2))=(y-0)/(-6*SQRT(2)-0)=(z-0)/(12-0)
ľAB:(x-6*SQRT(2))/(-6*SQRT(2))=y/(-6*SQRT(2))=z/12
դǤ10.5ꭡz=10.5Ȥ
(x-6*SQRT(2))/(-6*SQRT(2))=y/(-6*SQRT(2))=10.5/12=105/120=7/8
solve((x-6*SQRT(2))/(-6*SQRT(2))=7/8,x);x=3*SQRT(2)/4
solve(y/(-6*SQRT(2))=7/8,y);y=-21*SQRT(2)/4
C(3*SQRT(2)/4,-21*SQRT(2)/4,12)
D(0,0,12)ȤεΥ
SQRT(EXPAND((3*SQRT(2)/4)^2+(-21*SQRT(2)/4)^2));15/2
դο2ǤαߤȾ¤15/2
ޤդǤα߼Ψ3Ѥ(15/2)^2*3;675/4()
ǿ2Ѥ꤬ǤƤ褦ʤΤǤ
z˿ľʿ̤Ȥθ(PȤ)
(x-6*SQRT(2))/(-6*SQRT(2))=z/12 x=-z*SQRT(2)/2+6*SQRT(2)
y/(-6*SQRT(2))=z/12 y=-SQRT(2)*z/2
ꡡP(-z*SQRT(2)/2+6*SQRT(2),-SQRT(2)*z/2,z)
(0,0,z)ȤεΥ
expand((-z*SQRT(2)/2+6*SQRT(2))^2+(-SQRT(2)*z/2)^2);z^2-12*z+72
integrate(z^2-12*z+72,z,0,12);576
˱߼Ψ򤫤576*3;1728(2(žж)Ѥ)
˭ԡ 89ʲС 14:53:27 MAIL:fttnm528@ybb.ne.jp 25583
ȥȥ
ƴֽ줫ꥢ륿ˤäȸƤ˺Ƥޤ
ιԤ˽Ф뤿ʤȤˤȹͤƤߤޤ
Ʊ112cmΩΤˤϤ345λѷDz򤭤ޤ
ʼ˸лԡ 810ʿ 1:09:28 MAIL:h-sakai@zb3.so-net.ne.jp 25584

äȲ򤱤
1323/8μʤʤæФǤޤǤ
45ٲžƾ֤ǡĹˤʤΤʤäƤȤǡ׻ľޤ
夫鸫12cmȤʤΤǡ12-10.5=1.5cmȡ62δ֤΢45
顢ѷᡢžεΥ7.5cmƳϷ׻
15/2^2*3=675/4cm^2

ƽ 810ʿ 10:36:14 HomePage:θ줳ߤ󡪡25585