!!!
CPαĹADαĹθSȤ
ASCRACˤʤΤ2:AC=AC:2*9AC=618
͡ 14ڡ 0:32:56 46880
ǯ
ޤƤǤȤޤǯꤤޤ
٤λȤǺߤޤɡ
ãѢãңѤꡢá᣶Ѥϣᣱˤʤޤ
14ڡ 0:33:24 46881
٥륯åĥ
ѷѣäȣãѣҤ91ʤΤ31桢г6Ȥʤꡢ66218Ǥ
빽äƤޤޤ
14ڡ 0:35:54 46882
baLLjugglermoka
1,91:3dzͤƱǤ(^^)
14ڡ 0:49:11 46883
̾
Ǥ⡢겿褫ǤߤȤ褦.......
Ǥ5ǯʾβ䡩
14ڡ 0:50:49 46884
Ȥ
ɸ
A(0,a),B(0,0),C(a,0),D(0,a),Q(b,0),R(8*b/9,a/9)Ȥ
RC=2ǻʿȢCRQǢCRQ=45;
2ϢΩǤ롡XMaxima Ĺ1Ԥ

rhs(part(part(solve([part(num(factor((a-8*b/9)^2+(a/9)^2-4)),2),part(-num(factor(2*((a-8*b/9)^2+(a/9)^2)*((b-8*b/9)^2+(a/9)^2)-((a-8*b/9)^2+(a/9)^2+(b-8*b/9)^2+(a/9)^2-(a-b)^2)^2)),3)],[a,b]),3),1))^2;
18()
˭ԡ 14ڡ 0:53:26 MAIL:fttnm528@ybb.ne.jp 46885

Ф
Ƥޤޤ
2018ǯɤ
14ڡ 1:27:38 46886
ˤ⡼
ǯǤ
ʬ⣱椫飱򻻽СгĹȽФޤ
˵ŤΤä
Ƕ٤ʤäƤƤ褦ʵƤʤʤ
̸ǭ 14ڡ 2:24:15 46887
鯤ο
RAQxȤQ(a,0)A(-8a,0ˤȤ
QRC45롢RCᣲ顢C(2,2)
S(-3.5a,4.5a)ȤȡSAQϢASQ90ľջѷ
ǡACQ45ꡢA,C,QϡS濴ȤƱ߼ˤ롣
顢SC^2SQ^2AQ^2/2
顢(2+3.5a)^2+(2-4.5a)^240.5a^2
ȡ4a^22-2a

ABxȤȡAC=2xǡARC;Ѥơȡ
x^22+32a^2+82a
򭢤ȡaa^2äơx^2=18
//
14ڡ 2:46:01 46888
̴
ޥ

ޤƤǤȤޤǯ⵹Ƴꤤ
夲ޤϡߤΤǤ桹Ť
˵Ťޤǣ֤⤫äƤޤޤ
ǯ᡹ʼʬ´Ǥ
ٻΤ桡 14ڡ 11:57:04 46889
⡼ޥ
ޤƤǤȤޤ

PC˺Ƶ...
ҤäȤꤵƤ뤫ȻפäƤޤ...^^

ͤƱAQCCQR˵Ťޤ ^^
9:QC=QC:1
QC=3
so...AC=3*2
so...ABCD=6*6/2=18 cm^2

ǯꤤޤäm(_ _)m
14ڡ 15:52:29 46890
ֿء׾ι
ǯޤƤǤȤޤ
ǯꤤޤ
ǯ᡹ХХƤơˤʤäƤޤޤ
14ڡ 18:56:04 46891

ǯޤƤǤȤޤ
ϣǯΣǤ礦
ޤȤ줫뤾ȷաʡˤΤβ󤫤Ϥ֤⣸꤫ȴФoutǤˡǯϤȿʷդפߤȻפޤ
ǯꤤޤ

Ϻꡡ 14ڡ 19:12:59 46892
ѥ
ޤƤǤȤޤ
ǯoffڤäǤ꤬Ȥޤ
ǯꤤޤ

45ʤɤȤإʳ٤ΰ̣˵դΤ˻֤ݤꡢ괺ACǤߤ򤱤ޤ
14ڡ 21:47:24 MAIL:dr-yasu@nifty.com 46893
ˤ
ޤƤǤȤޤ
Ƿ׻ޤ
줫漪ˤʤäƤޤޤ(T_T)
Ķļˡ 15ʶ 15:34:17 46894
Ȼ
ޤƤǤȤޤ
˵դѴؿǤޤ
15ʶ 18:33:30 46895
Ф
ޤƤǤȤޤPCB=ȤȤƻѴؿǰƻǤ(sin)^21/18Ѥ(18sin)2Ȥ뤫18
15ʶ 20:52:37 46896
Ф
ʤΤɤǤ礦
ĹABCDAB3ܢ3BC5Ǥ롣
ADPCDQäPBQ45롢BPQ60Ǥä
CQʤ
15ʶ 21:33:04 46897
Ȥ
#46897

򤤤Ƥߤޤ
ѷ60,45,75٤λѷQBC˿򲼤
60,90,30٤λѷ45,45,90٤λѷʬ
BP=a*(sqrt(3)/3+1),BQ=sqrt(2)*a,PQ=2*sqrt(3)/3Ȥ
BCQ,ABP,QDPǤ줾컰ʿǻΩMathematica Dz򤤤
Ŭʲʤ

Solve[25 + b^2 == 2 a^2 && (3 + Sqrt[3])^2 + c^2 ==
a^2 (Sqrt[3]/3 + 1)^2 && (3 + Sqrt[3] - b)^2 + (5 - c)^2 ==
4 a^2/3, {a, b, c}]
a -> Sqrt[13], b -> 1, c -> 2/3 (3 + Sqrt[3]) ꡡb=CQ=1()

1ʤǥץǤǤ͡
5ʬ餤ǽ餽ȻפäΤǤ
˭ԡ 17 2:34:56 MAIL:fttnm528@ybb.ne.jp 46898
Ф
Ȥ⤵ǤͷǤ꤬Ȥޤ
ФŪˤϤ⤦ñʤȤͤƤޤ
ꤽ񤷤ѤȤۤɷ׻ñˤʤꤽǤ
17 9:31:37 MAIL:hbmath1965@yahoo.co.jp 46899
̾
ФݤϻˡޤǤ
17 12:14:29 46900
Ф
̾
ߤޤ󤬻Ǥϲ򤱤ޤ󡣤֤
ʤȤͤˤϤ뤫ФƤߤޤ
ǯ򿩤Ȼ()ͷֿͤäƤޤäƼ䤷Ǥ
17 14:12:39 MAIL:hbmath1965@yahoo.co.jp 46901

#46897

QBP˲­HȤ
HAB,CD˲­򤽤줾D,EȤȡ
BH:HP=3:1BAPȢBDHBD=3BDHȢHEQιƱʤɤCQ=1
17 16:04:40 46902
Ф
#46902
æ˹ǤʤդޤǤ

ϤȸʣǿΤ˺äΤǤ
P=x+(3+3)iQ5+yi
P=Q*(1+i)/2*(3+1)/6
ȤƼ¿ʬȵʬϢΩˤƲ򤯡y=1ȽФ
17 19:29:17 46903
Ȥ
#46899

>ФŪˤϤ⤦ñʤȤͤƤޤ
>ꤽ񤷤ѤȤۤɷ׻ñˤʤꤽǤ

ؤDzˡѤƤäƤߤޤȤޤ
ʸ3ѿ1ѿ˸
μʬβˡñˤʤޤ
Ⱥ5ʬDz򤳤Ȼפ;6ǤƤ
Ѥꤷ5ʬǤǤޤǤ

ɸQ(5,a(=CQ))Ȥ
ľBPηtan(a+b)tan(a)=a/5,tan(b)=1ǤǤ
ľBPޤy=3+sqrt(3)xˤĤƲ򤤤
Pκɸޤ
sqrt(a^2+25)/(sqrt(3)/2)=BP/sin(75)ѷ
sin(75)^2*(a^2+25)-BP^2*(sqrt(3)/2)^2Ǥ롡XMaxima Ǥ

trigexpand(tan(a+b))$
rhs(part(solve(factor(ev(%,tan(a)=a/5,tan(b)=1))*x=3+sqrt(3),x),1))$
trigexpand(sin(a+b))$
factor(ev(%,cos(a)=sqrt(3)/2,sin(a)=1/2,cos(b)=sqrt(2)/2,sin(b)=sqrt(2)/2))$
part(solve(part(-num(factor(3*(%o2^2+(3+sqrt(3))^2)/4-%^2*(25+a^2))),2),a),1);a=1()
˭ԡ 18ʷ 12:54:07 MAIL:fttnm528@ybb.ne.jp 46904
cocogoo
R,CBCڤʬARαĹ˲­S,TȤСѷACTCRSǤ뤳ȤѤơAB=sȤСAC=(2)1/2s,CT=(2)1/2,RS=s/9,CR=2ꡢs/9/(2)1/2=2/(2)1/2ssxs=18
19ʲС 10:24:33 46905
baLLjugglermoka
ͤΥĥåˤ񤭤ޤǯJJMO11ϻDz򤱤ޤ͡ߤ˺˻Ƥޤ
19ʲС 13:56:24 46906
!!!
jjmo11ֲ򤤤baLLjugglermokaTwitter⸫Ǥ
(7^2-6*4/2)/2=37/2ʤǤ
˽ФʤΤ3:4:5μʤФʤȻפޤ
͡ 19ʲС 15:57:37 46907
ޤ
ֿء׾ιԤޤΤǤorz

ǯ˺ǯ񡢥ɥǿޤǤ( )䡡ޥ뤵

34Ϣ³Ǥʤ֤ؤʤ礳פϡ
äʤʤä褦ʵޤޡ
somewhere in the world 19ʲС 21:36:46 46908