٥륯åĥ
٥ڤAF:FC=13AD=DB=DH=3ʤΤAB=643FH=4.5ˤʤޤ
716ڡ 0:06:36 49338
鯤ο
ФꡢAF:FC1:3
CFH梤CAB
AB2AD2DH3*2=6
FH6*3/(1+3)9/2
//
716ڡ 0:08:27 49339
ǯ
ABHľѻѷǤꡣDABʤΤǡDH=DA=DB
AB=6
Фˤꡢ
AF:FC=1:3
AB//FH
FH=AB*3/4=9/2
716ڡ 0:15:43 49340

ƤΣ̤Ǥ
Τ褦ȯ۰ȯδ繥Ǥ
716ڡ 0:15:55 49341
⡼ޥ
BC=ACü첽...^^;
AB=6 ʤΤ...
6*(3/4)=9/2
716ڡ 0:32:01 49342
Ȥ
ɸA(0,b),B(-a,0),C(3*a,0),D(a/2,b/2),H(0,0)Ȥ
DH=3껰ʿb=sqrt(36-a^2)Ǻǽκɸ
A(0,sqrt(36-a^2)),B(-a,0),C(3*a,0),D(a/2,sqrt(36-a^2)/2)
ľCD:y=-(sqrt(36-a^2)/2)*(x-3*a)/(3*a+a/2)
x=0ȤE(0,3*sqrt(36-a^2)/7)
ľBF:y=3*sqrt(36-a^2)*(x+a)/(7*a)
ľAC:y=-sqrt(36-a^2)*(x-3*a)/(3*a)
2ľθ
3*(x+a)/7=-(x-3*a)/3
9*(x+a)=-7*(x-3*a)
16*x=21*a-9*a=12*a
x=3*a/4ľBFᤷ
y=3*sqrt(36-a^2)*(3*a/4+a)/(7*a)
=3*sqrt(36-a^2)/4 ꡡF(3*a/4,3*sqrt(36-a^2)/4)
H(0,0)ȤεΥϻʿ
sqrt(9*a^2/16+9*(36-a^2)/16)=sqrt(9*36/16)
=sqrt(81/4)=9/2()
˭ԡ 716ڡ 0:41:23 MAIL:fttnm528@ybb.ne.jp 49343
ֿء׾ι
Фľ¤Ф߼Ѥ9٤Ȥޤ
716ڡ 2:48:38 49344
ޤ
⤷ơβΤޤޤˤʤäƤޤ󡩡䡡ޥ뤵
somewhere in the world 716ڡ 3:02:20 49345

ABHϢHľѤľѻѷʤΤABϢABHγܱߤľ¡
DľABʤΤǤγܱߤ濴
äDH=3ϤγܱߤȾ¤ʤΤľAB6
ФˤAFFC=1:3ǤꡢBHHC椬
ʤΤǢABCȢFHCǤꡢ4:3
äFH=6*(3/4)=4.5

ФΤȤϡ¤ϥФФƤ餺򥴥祴äƵޤ
716ڡ 14:54:07 49346

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716ڡ 15:01:05 49347
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줫ͤޤ
ԡ 716ڡ 16:14:17 HomePage:湩ؤ˥49348
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