ޥĥ
ޤη׻ߥǥޤûפĤޤǻ֤ޤǰ
夫鸫ơѤ¤˿ȣλѷѣӤ濴̤ꡤλѷȤǤ͡
ɤǤѤ餺פޤ
1217ڡ 0:12:28 43981
٥륯åĥ
Уäʤä桢ʤȤΩ夬äΤǻ˻äǤޤ
345Ѥơ4ߡ3/5ˡߡ3/5ˡߡ3/4ˡ27/25
ޤΤȤޤ
1217ڡ 0:29:47 43982
ǯ
QAB˿­MSAB˲­NȤ롣
ADABBD543ʤΤǡAQAMPQ543
QAMBQMASN543ľѻѷޤBQMASN
AQ5ȤƷ׻ȡAM4ANMB94AB25/4
ABޤǤ25/43cmι⤵ʤΤǡANޤǤ9/4ϡ27/25 cm

1217ڡ 0:57:24 43983
baLLjugglermoka
ŤдñǤּޤ
1217ڡ 1:13:39 43985
ma-mu-ta
̿ޤʿ̿ޤȤ߹碌ơ
RS4(3/5)(3/5)(3/4)27/25
ޤϤˡ
https://dl.dropboxusercontent.com/u/12482898/ch1512170956.png
1217ڡ 2:56:01 43986

ѣӤľѻѷʤΤǾ夫鸫ޤǣ¤ȣѣӤȾ£cmαߤ濴Ǹ롦ޤǤϽĴäΤǤ£ѣ˵դѡӤ¤˿ʿ­ԡաߤ濴ϤȤˢϣѣԢᢤϣңդ顢ʿȤäƣգᡢңӤϣգΣܡȻ
ǤʤߤʤΤ򸫤ǼǤ
Ϻꡡ 1217ڡ 6:42:49 43987
uchinyan
Ϥˤϡơϡ
ࡤʬäƤޤСʤۤɤǤΤʤΤǤʤʤդ˶ϫޤ
βˡǤ⡤ǤϰϻϰϡΡ345 ľѻѷľ¤Ф߼ѤľѡȤäƤޤ
ĿŪˤϡؤаפʡǤʤʤˤ⻻ȤʤȤ񡤤Ǥ
Ψ 50 % ʤΤǡŪˤɸŪ񡤤Ǥ礦
⤦åȤǤʵ⤷ޤʴǡ

ޤ̤鸫ޤꡤǽǤ AD ޤʿ̤ϱ̤˴ؤƷ ABDC ˴ؤƺоΤǤ
QS AB ˿򲼤­ EF ȤPR ABDC ˿򲼤­ GH Ȥޤ
դȤꡤGH AD ˤޤ
DB = 3 cmAB ϱߤľ¤ʤΤ AB = 2 * 2 = 4 cmꡤDBA 345 ľѻѷǡAD = 5 cmǤ
ˡPQEG ĹʤΤǡGEA = 90롤GAE DABGAAEGE = DAABDB = 543
ޤPQ = GEAQPQ = 53 = GAGE = GAPQAQPQAE = GAGEAE = 534
ǡAQAE = 54QEA 345 ľѻѷˤʤޤ
ǡAB ϱߤľ¤ʤΤǡAQB = 90롤ǡBQA QEABQQAAB = QEEAAQ = 345
AB = 4 cm ʤΤǡQA = AB * 4/5 = 4 * 4/5 = 16/5 cmǤ
ˡQAS = 90ꡤQS ϱߤľ¤ǡQS = AB = 4 cmQAQS = (16/5)4 = 45ǡ
SAQ 345 ľѻѷˤʤꡤAS = AQ * 3/4 = 16/5 * 3/4 = 12/5 cmǤ
ǡSAF = SAQ - QAE = 90- QAE = AQEꡤAFS QEAǡ
AFS 345 ľѻѷǡAFFSSA = 345AF = SA * 3/5 = 12/5 * 3/5 = 36/25 cmǤ
ꡤRSFH ĹʤΤǡRS = HFAHF ADBHFDB = AFABHF3 = (36/25)4
RS = HF = 36/25 * 3/4 = 27/25 cmˤʤޤ
ͥνȡ 1217ڡ 16:28:41 43988
Ȥ
A(-5/2,0,0),B(7/10,0,-12/5),D(5/2,0,0),P(-5*cos(a)/2,-2*sin(a),0)
R(5*cos(a)/2,2*sin(a),0),ABľ¤Ȥ:(x+9/10)^2+y^2+(z+6/5)^2=4
٥ȥDB:(-9/5,0,-12/5)P̤뤫ľPQ
(x+5*cos(a)/2)/(-9/5)=z/(-12/5)ѷ
(x+5*cos(a)/2)/3=z/4=s(ѥ᡼),y=-2*sin(a)
Q(3*s-5*cos(a)/2,-2*sin(a),4*s)줬ABľ¤Ȥ߾ˤ뤫
(3*s-5*cos(a)/2+9/10)^2+4*(1-cos(a)^2)+(4*s+6/5)^2=4sˤĤƲ򤯤
solve((3*s-5*cos(a)/2+9/10)^2+4*(1-cos(a)^2)+(4*s+6/5)^2=4,s);s=3*(cos(a)-1)/10
P(-5*cos(a)/2,-2*sqrt(1-cos(a)^2),0),Q(-(16*cos(a)+9)/10,-2*sqrt(1-cos(a)^2),6*(cos(a)-1)/5),A
AQ^2:PQ^2=(-(16*cos(a)+9)/10+5/2)^2+4*(1-cos(a)^2)+(6*(cos(a)-1)/5)^2:(-5*cos(a)/2+(16*cos(a)+9)/10)^2+(6*(cos(a)-1)/5)^2=25:9
9*((-(16*cos(a)+9)/10+5/2)^2+4*(1-cos(a)^2)+(6*(cos(a)-1)/5)^2)=25*((-5*cos(a)/2+(16*cos(a)+9)/10)^2+(6*(cos(a)-1)/5)^2)
򤤤
solve(9*((-(16*cos(a)+9)/10+5/2)^2+4*(1-cos(a)^2)+(6*(cos(a)-1)/5)^2)=25*((-5*cos(a)/2+(16*cos(a)+9)/10)^2+(6*(cos(a)-1)/5)^2),cos(a));
cos(a)=-7/25,cos(a)=1(Ŭ)R(-7/10,48/25,0)̤٥ȥDBľRS
(x+7/10)/3=z/4=t(ѥ᡼),y=48/25 S(3*t-7/10,48/25,4*t)(1)
줬ABľ¤Ȥ߾ˤ뤫(3*t+2/10)^2+(48/25)^2+(4*t+6/5)^2=4򤤤
solve((3*t+2/10)^2+(48/25)^2+(4*t+6/5)^2=4,t);t=-27/125(1)ȤS(-337/250,48/25,-108/125)
RSϻʿsqrt((-7/10+337/250)^2+(108/125)^2)=27/25()
˭ԡ 1218ʶ 0:12:37 43989
uchinyan
ǼĤɤߤޤ


ʲεҤϡ⤽ϻ伫ȤٶΥ˲᤮ʤΤǤ
޳ѤʤΤǤͤޤǤˤȻפäƸΤǤ
Ȥ⤢äơˡʬϻ F.A.Q. ΡֻϰϡפεҤ򻲹ͤˡ
ĿͤǤиǼŪ˹ԤäƤΤǤäơҴŪʤΤǤϤޤ
ޤǤ⤴ͤǤ餺

#43981#43982#43983#43986#43988
Q AB ˿򲼤ʤɤơ345 ľѻѷľ¤Ф߼ѤľѡѤƲ򤯲ˡ
ܺ٤ˤϥХꥨ󤬤褦Ǥ
#43988ϳȰäƼ㴳̵̤褦ǡAQBS ĹAFHF = ABDB = 34ȤǤ͡

#43987
#43981ʤɤȤۤƱǤǻʿȤزˡ

#43989
ɸˤزˡ
ͥνȡ 1217ڡ 15:21:18 MAIL:uchi@sco.bekkoame.ne.jp 43990
ޥ
Ǥ¤189ξƤľäꤷޤ...

http://www.sansu.org/kakomon/toi189.html
MacbookPro 1217ڡ 20:43:55 43991
uchinyan
#43991
κϤޤäƤޤǤࡤʤʤǤ͡
ͥνȡ 1218ʶ 15:34:25 MAIL:uchi@sco.bekkoame.ne.jp 43992
ǯ
#43991_ǯĩΤŪƬ˻ĤäƤꡢ򤭤ϤơͤˤʤΤǤϤȻפϤΤǤ
ͤˤˤ褦Ȥȡäƻ֤ꤽʤΤǡΤޤ޵ޤ

1218ʶ 22:05:31 43993

ѣӤľѻѷʤΤǾ夫鸫ޤǣ¤ȣѣӤȾ£cmαߤ濴Ǹ롦ޤǤϽĴäΤǤ£Ѥ˵դѡӤ¤˿ʿ­ԡաߤ濴ϤȤˢϣѣԢᢤϣңդ顢ʿȤäƣգᡢңӤϣգΣܡȻǤʤߤʤΤ򸫤ǼǤ
ޤƱФƤޤޤʲ̤Τޤޡ󥿡ǤⲡƤޤä

Ϻꡡ 1218ʶ 22:50:03 43994