鯤ο
A(0,0,1),B(1,0,0),C(0,1,0),D(0,0,0)Ȥȡ
Q(2,0,-1),R(-1,2,0),S(0,-1,0),P(0,0,2)

ABCD=1/6

PQ=(2,0,-3),PR=(-1,2,-2),PS=(0,-1,-2)

PQRS=1/6*abs(
det(

2 -1 0
0 2 -1
-3 -2 -2

))=15/6

PQRS/ABCD=15
//
113ڡ 0:37:34 51941
ŴϷ
ABCDΤȤƲ򤭤ޤABCD11cmΩΤ1/3ܤǤPQRS13cmΩΤ(33-2124)/(33)=5/9ܤǤľΤ1/3ܤǤʤΤǻABCDѤ1/3㎤ǤꡢPQRSѤ333(5/9)(1/3)=5㎤ȤʤޤäƻPQRSϻABCD5(1/3)=15ܤȤʤޤ
113ڡ 1:08:52 51943
Ҥ
̤β򤹤Ȱ㤦ˤʤäƤޤޤ夬ޤ
ɤְäƤΤƤ

ABCDΤȤPQRSΤˤʤ롣
ABPQĹᡢ3褹椬Ф롣
ȹͤޤ

A,B,D,P,Q Ʊʿ̾ˤ롣ABDѷ
AB=2 Ȥȡ
AQ=4AP=2PAQ=120
ABA˿ФP餪ȤθTȤ
AT=1TQ=5PT=3PTQ=90
PQ^2 = 5^2 + (3)^2 = 28
PQ=27

ABPQĹ 2:27 = 1:7
1:77
113ڡ 1:08:54 51944
ŴϷ
ǼĤ˽ƽ񤭹ߤޤԴʤΤǡΩ᡼ȥñ̤񤤤ʸƤޤޤɤ⤹ޤ󡣻䤬񤤤ֹ519431/35θʸΤϡΩ᡼ȥǤΤĤɤǤäƲ
113ڡ 1:33:56 51945
٥륯åĥ
1ΩΤ4ĤĺΤ򸵤ȤơĹƤǤΤ3ΩΤ˹碌ƹͤޤ
99-12245̤Ȥƹ⤵3ľΤ4ĤĺΤˤʤΤǡΤѤ15ܡ
113ڡ 2:03:39 51946
CRYING DOLPHIN
A-BCDĺľ(⤦ˤ̤ʿԻշλͳ)
֤Ǥ15ܤȤʤ뤳Ȥǧޤ֤Բǽʻ
ǤäƤϤΤޤޤʤΤ
夲ƻ衡 113ڡ 2:06:12 MAIL:Ԥ HomePage:ԤԤ󤹤51947
baLLjugglermoka
ü첽ʤܲ򤭽ǤդΤˤ˻ֳݤޤ
113ڡ 2:56:01 51948
CRYING DOLPHIN
ǤդλΤʿϻΤळȤǤϾ15ܤǤ
(ʤȤ⻻Ǥ)ޤǤˡĤʤ
夲ƻ衡 113ڡ 8:53:38 MAIL:Ԥ HomePage:ԤԤ󤹤51949
鯤ο
#51949
եѴѤޤ󤫤顢ΤΤĺ¾ĺؤ3Υ٥ȥľɸϤ3ñ̥٥ȥѴѴȡεѴͤ뤳ȤǡA(0,0,1),B(1,0,0),C(0,1,0),D(0,0,0)ξͤǡü첽Ǥʤ̤βˤʤޤ
113ڡ 9:01:32 51950
٥륯åĥ
ľΤ̤гդȤʤʤ黻ϰϤʬǤǤʤ礬ǤʤΤ̤ˡͤǤ

ʿϻΤϻϰϤ񤷤Ǥ͡
113ڡ 9:08:39 51951
̵̾
ֿء׾ι
ޤgeogebraꤤޤ
113ڡ 11:28:27 51952
ߤ
ΩΤΰΣ£ãĤˤʤȤơСѡҡӤΰ֤ꡣ
롼ӥå塼֤򥤥᡼ĤĹͤޤ

ָλΤѤܡ⤵ϸƱפλΤĤǤơ
λΤȹפǣܡäƤȤʤɥ᡼Ť餤Ǥ͡
113ڡ 14:59:26 51953
ߤ뤯
http://www.sansu.org/used-html/index396.html
113ڡ 15:24:50 51954
ޥ
#51954

....ʴ˺Ƥޤ
Macbook 113ڡ 17:32:14 HomePage:51955
٥륯åĥ
դ򿭤ФȤ˹⤵2ܤˤʤΤѤ2ܡAQRSѤϤȤ8ܡ
ѷQRS̤ȤȤAι⤵1ȤȡBAQʤΤ21ľѻѷBι⤵1/2CBRʤΤǹ⤵1/4DCSʤΤǹ⤵1/8äPι⤵ϡ7/8ˡ2+1/8ˡ15/8ΤѤ8ߡ15/8ˡ1515ܤȤʤޤ
113ڡ 22:10:00 51956
̴
#51956
٥륯åĥ͡
ΰʬפ⡢ǼǤʤ䴶
ݤޤɤ⤢꤬Ȥޤ

ٻΤ桡 114ʶ 10:16:57 51957
Ҥ
#51944ʲ褷ޤ
>ABCDΤȤPQRSΤˤʤ롣
ʤꤳְäƤޤ͡Ѥ
114ʶ 20:21:19 51958
ǯ
1ΩΤܤΡѤΩΤ1/3ˤͤȡ
PQRSϰ3ΩΤվ˰֤
PRMȤơ
ѡ(1/3)*MQS*PR(1/3){(1/2)*QS*⤵3}*PR(1/2)*PR*QS
PR*QS10ʤΤǡѡ5
ΤѤ1/3ʤΤǡϡ15
114ʶ 23:25:20 51959
ֿء׾ι
򤹤ä˺ƤƼ餷ޤ
114ʶ 23:48:25 51960
Ф
#51954
ͤΡǽФͤޤƱФ줿äѤ줿ƱƱ㤬ȶƲä褦ʡĤϤ꤬Ȥޤ
115ڡ 17:24:01 51961
KawadaT
⹻ؤǤβˡǤ
PRQSϡֺɸεΥ顢5Ĥ4դ;Ǣ7ˤʤޤȤϡ✖️⤵➗3Ѥޤ

ˡϡ̤ǤƤޤ
115ڡ 19:15:45 51962
ɥȥ
פ֤ˤäƤߤޤ#51944Ҥ蘆Ʊ褦˹ͤƤޤɲ򤱤ǧڤ뱩ܤˡ
ˡȤƤϡΤΩΤĤĤäĤƤ᡼Ǥ礦
115ڡ 20:41:20 51963
ߤ뤯
#51954
1157βǤ͡
ΥȤʣϸäΤ396ΤȤפФʤäΤǡʤȻפäƤΤǥåꤷޤ
115ڡ 23:30:35 51964
ɥȥ
#51963­Ǥ
ABCD1Ȥȡ
ACDR=ABCD=1BDQR=ABDR=2APQR=ADQR=4DPQR=8
BCDQ=ABCD=1CDQR=BCDQ=1CDQR=DQRS=1
ACPQ=ACDQ=2CDPQ=DPQS=4
ADRS=ACDR=1APRS=ADRS=1DPRS=2
PQRS=DPQR+DQRS+DPQS+DPRS=15
ä15ܤȤʤޤ͡
116 22:38:38 51965