ߤ뤯
1:21:33:4:5Ǥ͡
66ڡ 0:06:42 40607
Mr.ǥ
ܣ£ġ1/2ꡡܣã£С1/3
£С9*218
ãС18/36
Уġ9/24.5
ãУĤϡ345λѷȤʤꡡãġ6*5/4ˡ15/2
----------------------
̲ͣ¤ͤȤƣͤȣĤ֤
ܣͣġܣ£á45뢪ͣ//£
ͣĤȣФθŤȤ
£ġУġ2СУġ41

ͥ饦ơʻԲĤʤ顢Ф̤ģͤʿơ
šţС51š9*5/6ˡ15/2
УááݣС15/2*296
ãУĤϡ345ãġ15/2
----------------------
̲2ͣĤΣ¦αĹˣġģѤȤʤѤ
á£ĤʿդȤ뢤£Ѥ˳ܤĹ
£Ѥγ¦ˡľѤ򶴤դ椬12ľѻѷĤȡ13ľѻѷ
ĤǤޤ
äơ£СУá31ȤʤꡡУá18/36
ãУĤ345λѷȤʤꡢãġ6*5/4ˡ15/2
66ڡ 1:23:03 40608
ߤ
ĤķȤ߹碌޷γȤդȡͳѷ¤Ť͹碌
ȤȤäƲ򤤤ƤȤǤ礦

Ϳ줿޷γȤΤϵŤΤ٤줬ʤ
66ڡ 0:40:42 40609

0:59Ǥ뤳Ȥ˵դΤǼ¼15ʬǤ

ACαĹ˳ABEȤʤEȤäơȤϻѷ(1:2¿)ȳѤʬȤäƤޤPD=9/2PC=63:4:5ľѻѷʤΤCD=15/2ѤʬäƻϰǤä
66ڡ 1:18:29 40610

ǤֳABE=90ȤʤE򡦡פǤ

ѤʬϻϰǤ͡
66ڡ 1:21:41 40611
Ȥ
ɸB(0,0),A(2*a,0),D(2*a,a)Ȥ
ľBC:y=x,AC:y=-2*(x-2*a)θC
x=-2*(x-2*a) 3*x=4*a x=4*a/3 C(4*a/3,4*a/3)
B,A濴ˤ줾Ⱦsqrt(4*a^2-81),9αߤθȤP
PD=sqrt(a^2-81)(袤PADľѻѷ)Dκɸa
CD=sqrt((4*a/3-2*a)^2+(4*a/3-a)^2)=sqrt(5*a^2/9)=a*sqrt(5)/3maximaǽФ
e1:x^2+y^2=4*a^2-81$
e2:(x-2*a)^2+y^2=81$
solve([e1,e2],[x,y])$
part(%,2)$
solve((rhs(part(%,1))-2*a)^2+(rhs(part(%,2))-a)^2-(a^2-81),a)$
rhs(part(%,2))*sqrt(5)/3;15/2()

˭ԡ 66ڡ 10:15:03 40612

ADBCαĹθEȤľջѷABE礦ABFEĤ롣
ACαĹEFθQȤ
EPABQCCAECCB12
줫颤ECDDBCABD123
ʬ롣
ޤAP9ȾPC6
ĤޤAC9615
QCAC12Ǥ뤫
QC7.5
QCDC7.5
ʡ
66ڡ 2:23:38 HomePage:40613

轵򤱤ǼĤ򸫤ƥ֤꤬äȤ˵դޤ1800ޤǽФƤΤ˲Ǥٶ­Ǥ줫ꤤޤ
66ڡ 2:26:11 HomePage:40614

ۤȰǡ轵衹򤱤ʤäΤǺϰײɤäǤۤȤ()
66ڡ 3:24:41 40615
ma-mu-ta
1ޥ9cmˤϤǤߤޤ

http://yahoo.jp/box/T4h9uk

ޤǡCDP梤AEFǡFEFA34 3 345
CDPD5/3(9/2)5/315/2
66ڡ 4:20:14 40616
ϥ饮㡼ƥ
ᤦޤѴؿǤtan(<abd)1/2Ȥ狼ΤǤȤϴñʷ׻Ǥ
66ڡ 5:43:21 HomePage:湩ؤ˥40617
и
Ϥ褦ޤʿ;ȤäƲ򤭤ޤϰDz򤭤äǤ
66ڡ 10:09:40 40618
⡼ޥ
ϤʤȤ...^^;
B90礭ľѻѷABC'...
AC'=(18+9/2)*2=45
AC=45*(1/3)=15
15-9=6
6 : 9/2 =4 : 3
Ĥޤ...AD=5*(6/4)=15/2

ϥץʤΤ...꤯ͤʤƤޤ...^^;...
⤷;ʬƻϩ 3ܤξʤ...ɤʤΤͤƤߤȻפޤ...
66ڡ 11:33:57 40619
uchinyan
Ϥˤϡơϡ
Ϥʲˡޤ͡㤨Сʴ

AD BC αĹθ EE BD αĹ˲­ HȤޤ
ޤABDPBAPAD ʤΤǡ
BPPA = APPD = BAAD = 21BP = AP * 2 = 18 cmPD = AP/2 = 9/2 cmǤ
ǡABE ľջѷʤΤǡ
AE = ABED = ADEDH ADPDH = DP = PD = 9/2 cmEH = AP = 9 cmBH = BP + PD + DH = 27 cmǤ
ǡBPC BHE ʤΤǡBPPC = BHHE18PC = 279 = 31PC = 6 cmǤ
ꡤDPPC = (9/2)6 = 34 ȤʤäơDPC DPPCCD = 345 ľѻѷˤʤꡤ
CD = PC * 5/4 = 6 * 5/4 = 15/2 cm
ˤʤޤ
ͥνȡ 66ڡ 12:04:47 MAIL:uchi@sco.bekkoame.ne.jp 40620
uchinyan
ǼĤɤߤޤ
Ϥʲˡ褦Ǥ

ص塤ǽιͤƱΤƱˡȤʬषޤ
ƱʬˤΤǤ⤽θξܺ٤Ϥ٤ưۤʤäƤ褦˻פޤ
ɤϡABAD = 21 鲿餫ˡ PC = 6 cm ʤɤᡤ
DPC DPPCCD = 345 ľѻѷˤʤ뤳ȤȤˡΤ褦Ǥ

#40608Ρ̲
AB MMD AP θ E Ȥƹͤˡ

#40608Ρ̲2
AD αĹ AD = DQ Ȥʤ Q ꡤACBC ʿդȤ ABQ ˳ܤĹäƹͤˡ

#40609#40610(¿ʬ)#40613(¿ʬ)
ĤķȤ߹碌޷γȤդ AB Ť͹碌 ABCD 礭ǹͤˡ
#40616οޤ򻲹ͤˤȡAB դȤηǤ롤Ȼפޤ
βˡξܺ٤ϡİäƤ褦Ǥ

#40616
1 ޥ 9 cm ˤϤǹͤˡźդƤޤ򻲹ͤˤȤǤ礦

#40619
ABC' = 90Ȥʤ礭 ABC' äƹͤˡ

#40620
AD BC αĹθ EE BD αĹ˲­ HȤƹͤˡ

#40608#40612#40617#40618
ؤˤˡ
ͥνȡ 66ڡ 14:51:45 MAIL:uchi@sco.bekkoame.ne.jp 40621
Ф
פ֤Ǥ˲񤫤ʤƤ褿tanβˡ
68ڡ 21:23:03 40622

1:21:345٤äƤΤͭ̾Ǥ͡
ܿĻԡ 69 1:44:57 HomePage:̣λ40623
粬ҹ
פ֤ޤŪȯۤФؤˡʿܻѴؿȤƤݤʤǤƱ褦ݤǤʡ
611ʲС 18:14:36 40624