ú
Ĥפ̻̤Ȱ̤δ֤ˤϤʤ餫ΰŪɤ
515ڡ 0:09:29 41778

http://www.dotup.org/uploda/www.dotup.org5061977.png
ʤ󤸤
515ڡ 0:13:10 41779

Ĥȣ£äʿԤȤƤɤʤΤǡD̤ACʿԤã¤αĹȤθŤȤȡţģ¤ϣջѷǣŤ£Ĥ˿УľѻѷˤʤΤǢţģ¤Ѥϣģãšᢤ£ĤʤΤǡͳѷ£ãġᢤţģ
פ֤1ˤɤ夭ޤ
Ϻꡡ 515ڡ 0:22:34 MAIL:yokoyama3548@yahoo.co.jp 41781
Mr.ǥ
DB̤ȤϢꡡ̡ͣ1.5̣Ρ3.5
ͣ+̣ΡͣΡȤʤΤ
̡͡Τϰľˤꡡ
//ͣ//£

ʬ£äΣ¦αĹˡţ¡3ȤʤꡢȣŤ֤
ãŤϡããš10š12Ȥʤջѷ
ŤȤȤȡãȡ8Ȥʤ
ͳѷ£ãġᢤţá(1/2)*12*848
Τ褦˵ޤ
515ڡ 0:28:48 41782

ᤤ(#41781)ȡƱǤ
裲롼ס 515ڡ 0:32:12 HomePage:41783
⡼ޥ
#41781
ᤤƱǤ ^^
ADBC10cmȾʬ5cmAD//BC
ȷޤ櫓Ǥ...ʿԤΤȤʳ5cmˤʤʤ^^

#41779
餹οޤϤ狼䤹Ǥ͡
ΤȤϡAD//BC...гθʿԻշդǤǤ뢤Ϥ줾γѤʿԻշդǤǤ뢤ѤƱʤΤǢABCD=2*ʿԻշäƤ櫓ʤǤ͢
¨ ^^;v 515ڡ 0:49:25 41784
٥륯åĥ
ADM(Ĺ6)ĺAƱͤBCDڤȤȡȤλͳѷȾʬѤ¹ԻշǤޤ
MNʬȡդĹ655ջѷǡȤλͳѷѤλʬΰ졣
Ϥ黰ʿʤˤɤѤ뤫Ǥ͡
դ椬345ľѻѷˤʤΤμȤΤäƤƤ⡢ξ缫ʬǿ޷¤٤ʤɹפƾʤƤϤʤΤǡ
515ڡ 1:22:30 41785
٥륯åĥ
ǽʬ#41779餹οޤƱǤ
515ڡ 1:35:32 41786
Ȥ
ɸǤޤ

AB=a,CD=b,B(0,0),C(7,0)Ȥ
B,C濴ˤ줾Ĺa,10θȤA
줾Ĺ12,bθȤDAD=3,MN=5Ȥa,b
ABC,ACD򤽤줾إθǵ­ƢABCDѤ
xmaxima

e1:x^2+y^2=a^2$
e2:(x-7)^2+y^2=10^2$
solve([e1,e2],[x,y])$
part(%,2)$
rhs(part(%o4,1))$
rhs(part(%o4,2))$
e3:x^2+y^2=12^2$
e4:(x-7)^2+y^2=b^2$
solve([e3,e4],[x,y])$
part(%,2)$
rhs(part(%o10,1))$
rhs(part(%o10,2))$
num(factor((%o11-%o5)^2+(%o12-%o6)^2-3^2))$
e5:expand((part(%,2)+part(%,3)+part(%,4)+part(%,5))^2-part(%,1)^2)=0$
num(factor(((%o11+7)/2-%o5/2)^2+(%o12/2-%o6/2)^2-5^2))$
e6:expand((part(%,2)+part(%,3)+part(%,4)+part(%,5))^2-part(%,1)^2)=0$
part(solve([e5,e6],[a,b]),4)$
a1:7$
b1:10$
c1:rhs(part(%o17,1))$
expand((a1+b1+c1)*(b1+c1-a1)*(c1+a1-b1)*(a1+b1-c1))$
factor(%)$
sqrt(%)/4$
a2:3$
b2:10$
c2:rhs(part(%o17,2))$
expand((a2+b2+c2)*(b2+c2-a2)*(c2+a2-b2)*(a2+b2-c2))$
factor(%)$
sqrt(%)/4$
%o23+%;48()
˭ԡ 515ڡ 1:58:33 MAIL:fttnm528@bb.ne.jp 41787
ǯ
ԤƿƤޤäοʬ˵줿
ͣΤġܣ£äȾʬʤΤǣ//£äȤϻפäγǧ˼ꤳޤܳФޤϤäƹͤޤɾˤϻ餺#41784ΡʿԤΤȤʳϣˤʤʤ...פƱͤǼʬǼ...
Ȥϡͳѷ£ãĤ򣱣ž¤򤯤äĤơ
ľѻѷꡢġݣ£ô֤εΥ򣴣ȵޤ
#41781#41782Τ褦˭ãĤѰưȤСġݣ£ô֤εΥޤǤ׻ɬפϤʤäΤǤ͡
515ڡ 2:49:51 41789
uchinyan
Ϥˤϡơϡ
ϡɤ˺ޤ򤤤Ȥޤʴǡ

AC L Ȥޤȡ
AMAB = 12 = ALACAML ABCML//BCMLBC = 12ML = BC/2 = 7/2 cm
CNCD = 12 = CLCACNL CDANL//DANLDA = 12NL = DA/2 = 3/2 cm
ꡤML + NL = 7/2 + 3/2 = 5 = MNˤʤꡤL MN ˤޤ
ǡMN//BCMN//DAAD//BCˤʤޤ
ꡤAC BD θ O Ȥȡ
OAD OBCAOCO = DOBO = ADBC = 37
AO = AC * 3/(3 + 7) = 10 * 3/10 = 3 cm = ADDO = BD * 3/(3 + 7) = 12 * 3/10 = 18/5 cm
ǡA DO ˿򲼤­ H Ȥȡ
AO = AD ʤΤǡDH = OH = DO/2 = 9/5 cmDHAD = (9/5)3 = 35Ȥʤäơ
DHA 345 ľѻѷǤǡAH = AD * 4/5 = 3 * 4/5 = 12/5 cmǤ
ꡤAD//BCˤդơ
ABD = BD * AH * 1/2 = 12 * 12/5 * 1/2 = 72/5 cm^2ABDDBC = ADBC = 37
ABCD = ABD + DBC = ABD * (3 + 7)/3 = 72/5 * 10/3 = 48 cm^2
ˤʤޤ

ǽդϢʤΤǤɽ˽Фʤ褦ˤƤߤޤ
ǽ˲򤤤ȤˡML + NL = MNL MN 塤AD//BCդ˴ưФޤ
ͥνȡ 515ڡ 12:44:27 MAIL:uchi@sco.bekkoame.ne.jp 41790
uchinyan
ǼĤɤߤޤ

#41779#41785
ADBC äʿԻշꡤABCD = ʿԻշ * 2 Ȥäơ345 ͳDz򤯲ˡ
ABCD = ʿԻշ * 2 ǽʬʤΤǡAD//BC ϻȤäƤʤȻפޤ

#41781#41783#41784#41789
AD//BC ꤷƲ򤯲ˡºݡAD//BC #41782ʤɤˤǤޤ

#41782#41790
AC BD ꡤϢȤäơ MN ˤ뤳ȡAD//BC 򼨤345 ͳDz򤯲ˡ
㴳ΥХꥨ󤬤ޤ

#41787
ؤˤˡ

ĿŪˤϡ#41790ä櫓Ǥ֤#41779ʤɤβˡ⤢äʡפȡޤޤ (^^;
ͥνȡ 515ڡ 13:38:36 MAIL:uchi@sco.bekkoame.ne.jp 41791
⡼ޥ
#41791
>ABCD = ʿԻշ * 2 ǽʬʤΤǡAD//BC ϻȤäƤʤȻפޤ

ä Ǽm(_ _)m
쥬ȤʲˡǤ͢
¨ ^^;v 515ڡ 14:34:27 41792
ޤ
гθŤȤȡţĤջѷˤʤ롣
ţĤƤȤȡơ2.4ѤǤλѷι⤵ˤʤ롣
£Ĥ122.4ࣲǣΤϤΣʬΣܤˤʤΤǣ^2
񤷤꤫ˤʤä㤤ޤ
515ڡ 15:29:31 41793
٥륯åĥ
345˴ؤƤϡդ35ľѻѷ4¤٤ư5ꡢοޤ颢ߢ16Ǣ4Фޤ
˰աʢ-3ˤǤǤ
äȿؤäݤɾǤʬϰϤοǤΤǡϰȸäƤȻפޤ

޷դΤ񤷤Ǥ͡
515ڡ 16:07:42 41794
ϥ饮㡼ƥ
٤ʤޤԥ饹ѤǤABC˿
DBC˿Ǥ
515ڡ 16:50:00 HomePage:湩ؤ˥41795

򲼤ˤơʿԻշˤơȤϡȥԥ饹Ǥ
515ڡ 18:16:27 41796

ʿԻշȤϡ䤷ʡ
515ڡ 18:22:02 41797
ǯ
#41791,#41792˵ܤƤ褦ˡ#41779#41785ˡǹԤȡAD//BCפɤĹȤƤϡгĹ10cm12cmMN=5cmɬפǡAD=3cmBC=7cmפʾˤʤޤ󤫡
Ǥդ̻ͳѷγդ֤ȡʿԻշǤơդĹг1/2ȤʤΤǡˡʿԻշѤ⸵̻ͳѷ1/2
ְäƤ餴ʤ

516ʶ 23:15:42 41798
⡼ޥ
#41798
So do I ^^
¨ ^^;v 517ڡ 0:06:12 41799
ޤ
#41796, #41797
So do I (^^;

#41791, #41798
ʤۤɡ쥬ȤǤ͢
ʤֻ˸ȴʤȡûפ񤷤Ǥ͡ġ
517ڡ 2:54:36 41800
uchinyan
#41798
졤 ޤääפޤ
ͥνȡ 517ڡ 17:04:25 MAIL:uchi@sco.bekkoame.ne.jp 41801
Ф
ϰפäȤ֤˵դƲդ򺸤3cmФʿԻշäƣջѷäơꤵΤ褦˰⡣
Ƭ鶥ˤϻäʤ
519ʷ 23:19:45 41802