Ǥ⻰̤
̤ϸʤ
628ڡ 0:08:40 39517
Ҥ
ä̲ʡ
ޤ񤯤Τ˥㡼󤬣ޤä
628ڡ 0:11:17 39518
Ȥ
ɸ֤ޤ

ɸB(0,0),D(4*a,0),C(6*a,0)Ȥ
B,C濴ˤ줾Ⱦ10,5αߤθȤA
e1:x^2+y^2=100$
e2:(x-6*a)^2+y^2=25$
solve([e1,e2],[x,y]);
x=(12*a^2+25)/(4*a),y=sqrt(-144*a^4+1000*a**2-625)/(4*a)
AD=4 οͤxȤ
((12 a^2+25)/(4 a) - 4 a)^2+(Sqrt[-144 a^4+1000 a^2-625]/(4 a))^2 == 16 && x == 3 Sqrt[-144 a^4+1000 a^2-625]/4
mathematica 8.0 home edition Dz򤯤
Solve[((12 a^2+25)/(4 a) - 4 a)^2+(Sqrt[-144 a^4+1000 a^2-625]/(4 a))^2 == 16 && x == 3 Sqrt[-144 a^4+1000 a^2-625]/4 ,{a,x}]
N[%]{a -> 2.06155, x -> 24()}}
˭ԡ 628ڡ 0:18:32 MAIL:fttnm528@ybb.ne.jp 39519
ʸ
λȤʬޤ󤬡

4cmʬϻѷγѤʬ
ɤ餫ˣջѷ345ƤΤ
4*4/2*3/2=24
628ڡ 0:20:29 39520

ADαĹACʿԤB̤ľȤθͤ
ջѷ345
628ڡ 0:21:20 39521

ΣͤˤĤоΤȤ롣
ĤαĹȣäȤθŤȤ롣
ĤäνſȤʤ롣
£äѡᢤäѡᢤţäѤΣ
šᣳ/ߣġ᣶
ţäϣջѷǤꡢϡľѻѷʬ
628ڡ 0:25:02 39522
ߤ
ϡľѻѷɤ˻ŹǤ뤫
ˤΤĤΤ񤷤Ȥ¿ɡ

£αĹȡä̤ĤʿԤθŤȤ롣
£ģȢ£ãŤʤΤǡ椫šᣵãš᣶
ãŤջѷˤʤꡢãŤ˲­Ƥ
ȡƣŤľѻѷˤʤ롣

뢤£äѤϡդĹ椫颤ãŤΣܤˤʤΤǡ
ʣߣࣲˡߣᣲ

#39520ʤʸ
ΤǤפʾǤ͡
ֺ𤵤뤿ˤפʾäƤפȤΤϡʤʿءˤ
ǤϹޤʤߤǤ
628ڡ 0:36:43 39523

cmcmȤȤϣλѷɤˤǤȤ٤ʹͤΤƤߤȡŪˤϤ뤵ƱǤƥӤǡֿ纸פ򸫤Ƥ餳Τʬۤ٤ļˤʤΤǤλ֤ʤʡäǤˡǤˣ̾餤ƤΤˤӤäꤷʲ򤯿ȤˤȤäƤϤ줷ΤǤ˥ޥ뤵⿷ʤΤˤʤȤ˻֤򤫤פʤɤȤ󤳤Ȥͤʤ顦ڤäƤƤޤ
628ڡ 0:41:37 39524
CRYING DOLPHIN
MϢABMβžưΰտޤ뤫Ȥߤ
ï⤤ʤԳϡ 628ڡ 1:02:23 HomePage:ƻ39525
ͣ.ǥ
δطꡢĤϢܣ£äʬ¤͡ǤȤ
ĤΣ¦αĹˣģš4ȤʤŤȤ
Ϣꡡ£š2*͡ǣġ2*ģá£
¤Ť˲򡡣£ȤȤ
ȡ426.£Ȥϡ345λѷ
£ġ1/2*4*816
£á16*3/2ˡ24Ȥޤ
628ڡ 2:02:42 39526
ma-mu-ta
MȤޤ

ANNNMαĹADαĹθEAENCθFȤޤ
ANAB/2AC5NM//ACꡢͳѷANECɩǡAENC
ADEDCDMD21ꡢAE43/26
AFEF61/23 ꡢ
ɩг4ʬľѻѷ345
NFCF4Ȥʤ뤫顢NC428
ANCᢤABC1/2ɩANEC1/2
ABCɩANEC681/224
628ڡ 2:15:50 39527

BD:DC=2;1
AB:AC=2:1
ꡢADϢBACʬǤ롣
ä
BADCAD
ADĹB̤ACʿԤľȤθPȤȡ
ACD梤PBD
BD:DC2:1ĭ
ޤBACBPAǤ뤫顢
BPAAB=BP=10ջѷ
ACD梤PBD椬2:1ꡢ
PD=8
äAP=12
ĤޤꢤBPAAB=BP=10AP=12ջѷ
ǤѤĺBAPˤĹʤ⤵BHϡ
3:4:5
BH=8
BPA=128248
PD:DA=2:1ꡢABD16
BD:DC=2:1ꡢACD8
äơABC16824
轵ϻԤǤΤǡ٥󥸤ǤɤäǤ
ޤޤԤ­Ǥ͡
628ڡ 2:50:49 HomePage:39528

轵ľäΤǤ͡Ŀͤޤ(Τ᤹)߸̤ˤʤȻפǤޤǼĸƤäꤷޤ꤬Ȥޤ
628ڡ 2:55:08 HomePage:39529
(Keigei)
BAACBDDC ADϢBACʬ
BCADޤϤαĹˤ­GHȤС
DGDH21AGAH21 ǡAD4 AH3CH4 ˤʤޤ
äơADC8ABC3ADC24 Ǥ
628ڡ 6:32:50 39530
namba
CRYING DOLPHIN󤬽񤫤줿褦ˢABMM濴ȤƲžưƹͤޤ
ABMM濴˲žBCŤʤ褦ˤޤAΰưEȤޤ
AMEˤMA=MEMD:DC=1:2DϢAMEνſ
ADαĹCEȤθFȤFCECE=AB=10CF=5
ޤ DϢAMEνſAD:DF=2:1
äAF=6
ʾꢤACFCA=CF=5AF=6ջѷ
ϳƱͤ3:4:5ľѻѷȤACF12cm^2
äƢABC=AEC=2ߢACF=24cm^2
628ڡ 8:51:39 39531

Ǥ
βߤٶޤ
628ڡ 9:33:16 39532
ͣ.ǥ
ɤ #39530 ˣɼʥåꤷƤޤ͡
628ڡ 10:04:41 39533
abcba@baLLjugglermoka
DABʿԤľACȤθEȤ롣ADEդ椬3:4:5λѷ2ʬˤʤ롣ADE=16/3ADC=8äƭABC=83=24
628ڡ 11:00:31 39534
uchinyan
Ϥˤϡơϡ
⻻餷褤ǤȤƤϰפᤫʡĻĤβˡפդޤҤȤޤʴǡ

B AC ʿԤ AD αĹȤθ EB AE ˲­ HȤޤ
ACD EBD ꡤBECA = DEDA = BDCDBE5 = DE4 = 21BE = 10 cm = BADE = 8 cm
BAE ջѷAE = AD + DE = 12 cmAH = EH = AE/2 = 6 cmBHA 345 ľѻѷˤʤꡤ
BH = 8 cm Ǥ
ǡABD = AD * BH * 1/2 = 4 * 8 * 1/2 = 16 cm^2ABC = ABD * 3/2 = 16 * 3/2 = 24 cm^2ˤʤޤ

M ξפǤ͡
ͥνȡ 628ڡ 11:07:02 MAIL:uchi@sco.bekkoame.ne.jp 39535
uchinyan
ǼĤɤߤޤ

ϤꤤȤޤ345 ľѻѷɤǻȤΤϡƱǡ
ʳˤϡ餫ʿAD BAC ʬʤɤݥȤˤʤ褦Ǥ
M ξϻȤ鷺˲򤱤ޤ¤ϡ΢ˤϡ
ABC M 濴 180žƤǤʿԻշгθ M г 21 ʬ D
ȤȤƤ롤ªȡβˡ򤷤䤹褦Ǥ

#39520
AD BAC ʬǤ뤳Ȥ 345 ľѻѷ򸫤ĤƲ򤯲ˡ
ܺ٤ǤʲλˡΤɤ줫ʤΤǤ礦

#39521#39528(㴳̵̤亮𤬤뤫ʡ)#39534#39535
AD αĹ B AC ʿԤȤθͤ
ˤäƤǤջѷȾʬ 345 ľѻѷˤʤ뤳ȤȤˡ

#39522#39524
A M ˤĤоΤ A'AD αĹ A'C Ȥθ E ȤȡD AA'C νſˤʤ뤳Ȥȡ
AEC Ⱦʬ 345 ľѻѷˤʤ뤳ȤȤˡ

#39523
BA αĹ C AD ʿԤȤθͤ
ˤäƤǤջѷȾʬ 345 ľѻѷˤʤ뤳ȤȤˡ

#39526
AD BAC ʬǤ뤳ȤȡAB AD αĹ DE = 4 Ȥʤ E ͤơ 345 ľѻѷ򸫤ĤƲ򤯲ˡ

#39527
ANNNMαĹADαĹθEAENCθFȤޤ
Ȥƹͤˡǽ AN ϡ¿ʬAB ν񤭴ְ㤤Ǥ礦Ҥʤɤͳ 345 ľѻѷФƤ褦Ǥ

#39530
AD BAC ʬǤ뤳ȡBC AD ϤαĹˤ­ GH Ȥȡ
δط AH = 3 345 ľѻѷФƤơȤˡ

#39531
ABC M 濴 180žƤǤʿԻշг 21 ʬ D ˤʤ뤳ȤȤˡ

#39519
ؤˤˡ
ͥνȡ 628ڡ 12:23:24 MAIL:uchi@sco.bekkoame.ne.jp 39536
ϥ饮㡼ƥ
MATHEMATICAˤ뻰ѴؿѤǤɤ⤹ߤޤ󡣤ȤMATLABMATHEMATICA
˳Ѥ̵ΥեȤƱȯƤΤ򤴤󤸤Ǥ礦̣ΤͤϻƤ
628ڡ 14:24:14 39538

Ф⤷ޤ󤬡ġ
ACαĹAC=CEȤʤEȤ롣AE=10cm
BCϢABEȤʤ롣
BD:DC=2:1顢DϢABEνſ
ȤȤϡADαĹAEȤθFȤȡAF⢤ABE
AD:DF=2:1AF=6cm
ABEAB=AEջѷ顢AFBE
AE=10cm颤AFE3:4:5ľѻѷʤΤǡFE=FB=8cm
äƢABE=48cm^2
ABCѤϢABE1/2ʤΤǡABC=24cm^2
ФǤ¾βˡȤϻפʤäΤǤǤ͡
629ʶ 9:21:32 39539
xxx
xxx(sinnta)Ǥ

ߤʤ󤹤Ǥ

ͤϴǤ衣
629ʶ 22:26:19 39540
ޤ륱
630ڡ 11:19:46 MAIL:take4310@mobile.email.ne.jp 39541