̤ꤹ
710ڡ 0:41:28 42019
ߡ
12ʤ
710ڡ 0:48:27 42020

ޤ󡣺򤱤ƤޤǧǤ
٤äƤ5/12ˤʤ餺Τ̤ˤ狼ޤ󡣡
710ڡ 0:52:13 42021

ʬƤ5/12ˤʤޤ
710ڡ 0:53:08 42022

AC21ΤȤܤڤ뤫
5/12+2/121/12+4/12=7:12ˤʤϤ
710ڡ 0:54:55 42023
ma-mu-ta
5/12ˤʤޤ
710ڡ 1:02:55 42024
Mr.ǥ
5/12ˤʤޤǤǧڤǤʤäΤǡ᤯ʬ1/3ƤߤǧڤǤ
ΤǤޤ
Ʊפ򤷤Ƥͤ졢פޤ

3դa,b,cȤΤѤabc/3
ˤǤʬѤ abc/4-abc/9(5/36)abc
äơ75ʬ䤵졡͡5/12
Ȥޤ
710ڡ 1:07:31 42025
̤ꤹ
Ϥ5/12Ǥ͡Ȼפä
710ڡ 1:09:03 42026

ɸȤä2١ѵޤ
5/12ˤʤޤ()

710ڡ 1:11:32 42027
algebra
£š2ᡤ£á2⡤¡2 Ȥ
(8/3)ݣ(2/9)(1/3)(10/9)
(10/9)(8/3)5/12
5/12 ˤʤޤ
710ڡ 2:43:34 42028
ǯ
ᤤ5/12äƷǼĤȤǧڤ줺
8ܶ档ȿ֤Ǿ̲᤹ͽ
㤤ϰǤϿ夬դ붲줬ꡢԵӿ¤ο̤ƻ档
ۤ˼դʤȤȤϤʤ֤⤢Τǡˡ򤤤ƤߤޤϤ5/12
ʤäǧڤꡦȤȤǡȾʬäȾơ줿

EMDCθPȤȡѿNEDPѤƱ*⤵1/21/2
ΤȤλͳѿϤ߽Фʬϡ1/4*⤵1/31/12
ɡ1/2-1/12=5/12
ʤ줬ǽˡ

710ڡ 3:02:15 42029
ޥ
ߤޤīơåαĹΥϡե˺ٷ׻ƤߤȤ...ɤߥޤAC2:1ʬΤƱʤΤǤη׻Ǥɤߥä褦Ǥʷ׻ϲҤǹԤäΤǡϤ褯ʬ餺...˿ޤǤm(__)m
iMac 710ڡ 7:23:16 HomePage:42030
ǯ
ɣĤȥѥɤѤޤ
ɤǤ⤤ȤǤǤ#42029Ρ֤ȿ֡פϡ֤10֡פǤ10֤ȴޤ
710ڡ 7:26:12 42032

2ܤ5/12ޤ
ؤDz򤭤ޤ
710ڡ 7:47:22 42033
baLLjugglermoka
£ţãĤʿԤ̤NCD¦ȡڤΤ⤦Ĥι⤵1/3ˤʤޤ
ȤϡͳѤ1/33/4=1/4
ѿ1/21/3=1/6
­С1/4+1/6=5/12
710ڡ 10:11:30 42034
٥륯åĥ
ޥ뤵󤪤Ĥ줵ޤǤ
ͼ5/12ǧڤޤǤ2ۤɤľƹäƤȳοǤΤǡȤʤԤäƤޤ
ճ᤯ư¿Ǥ

CBAƱĹο˿ФFȤΤ򻰳Ȥޤ
ĹAEDFгϸߤNǸΤǡڤʿ̤EMFȤʤޤ
ͳѿA-BCDEĤǤƤǤ뺸¦ΩΤ򡢻ѿABMEȻͳѿA-DMGNʬ䡣
ͳѿA-BCDEѤ1ȤȡABE-FCDѤ3/2ȤʤޤѤ껰ѿABMEѤ1/4ͳѿF-MCDEѤ3/4򻰳ABE-FCDȻĤäѿA-EMFѤ1/2ˤʤޤ
ȻѿA-EMNѤѤ椫1/3ȤʤΤǡͳѿA-BCDEĤǤƤǤ뺸¦ΩΤ7/12Τ˾ۤ5/12Ȥʤޤ

ѤνФϻѷѷդѤѤǤĹʤΤǾά
710ڡ 10:43:09 42035
٥륯åĥ
10ͤˤޤǤǰ
ߤʤͥʤΤǡޤ˥ߥäƤ⤹Ŧͤơޤ͡
ͤᤤб⤵Ǥ
710ڡ 10:54:25 42036

ֿ޷ϡʡ֤פǤ͡˶Ǥڤä޷᡼Ǥ֡Ԥξʤ餳񤷤˰㤤ʤȤΤޤ޿Ƥޤīϥå˼졦֤Ȥ줿ΤDzĩ路ƤƤˤäȣţΤαĹ£ä̤ȣäΡʣʬ˾ǸȵĤ޷ꡢϲͤƱ褦˻ͳѿΣţͣãĤȻѿˤ櫓ƵޤʾʤäΤϰ㤦ͳǤäѤߤʤᤫäǤ͡ѿʬѤ1/3ݤ˺ʤɡʬϥХХ
äǤġ
710ڡ 12:07:04 42037
uchinyan
Ϥˤϡơϡ
ϲٷޤäƤΤǡΤͤϳھǤ礦Ǥʤͤ϶ϫΤΤޤ
ˤƤ⡤פ֤ΩΤǤ͡ʴǡ

EMN ̤ʿ̤ ȸƤ֤Ȥˤޤơ AC θ P ͤޤ
P ϡAC Ǥ ǤEN ʬʤΤǤαĹ⤽ǡ
F ABCF Ĺˤʤ褦˼ȡF EN αĹˤΤǡF ˤޤ
ꡤMF ˤꡤAC MF θ ˤꡤ AC θ P ˤʤޤ
ǡAC L ȤȡꡤLPCP = LMCF = 12APPC = (AL + LP)PC = (3 + 1)2 = 21Ǥ
ǡͤͳѤ̤ĹνĤȲĹȹ⤵ĹŪ˷ƤͤѤʤΤǡ
׻ص塤 = BE = 6 cm = BC = 4 cm⤵ = AB = 6 cm Ȥޤ
ޤN BDCEABCF ˲­ HI ȤP BC ˲­ JȤȡ
MC = BC/2 = 2 cmNH = AB/2 = 3 cmNI = BE/2 = 3 cmPJ = AB/3 = 2 cm
ͳѤA-BCDE = 6 * 4 * 6 * 1/3 = 48 cm^3
ΩN-P-MCDE = ͳѤN-MCDE + ѤN-PMC = MCDE * NH * 1/3 + PMC * NI * 1/3
= ((4 + 2) * 6 * 1/2) * 3 * 1/3 + (2 * 2 * 1/2) * 3 * 1/3 = 18 + 2 = 20 cm^3
ͳѤA-BCDE ΩN-P-MCDE Ω = 48 - 20 = 28 cm^3

ѤϡͳѤA-BCDE Ρ20/48 = 5/12
ˤʤޤ
ͥνȡ 711ʶ 10:55:38 42038
⡼ޥ
äȤ狼ޤ ^^;
(1/2)*(1/3)*(1/2)+(2/3)*(1/2)=1/12+1/3=5/12
Ĥʤ֤ϻͶȬOrz

ľΤͤƤξ̤αѤȸդEM̤ʿ̤ǤƤ뤳ȤAC2:1ABι⤵1/3Ȥ狼...ȤϾη׻ǡOrz
¨ ^^;v 710ڡ 13:41:43 42039
uchinyan
(㴳ɲäޤ)
ǼĤɤߤޤ㴳𤬤ä褦Ǥ͡

ơʬǤ𤬤äܺ٤褯ʬʤΤ¿ϸ̤ʬϤƤޤ


EMN ̤ʿ̤ AC ڤΰ֡AC 21 ʬ򲿤餫ˡǵᡤ
ʿ̤β¦ΩΤѤŬʬ䤹뤫Ϥ礭ΩΤ;ʬʬʿ̤ξ¦ΤƷ׻

ȤΤ褦Ǥ

21 Ȥʿ̤β¦ΩΤѤȤݥȤǤ͡
˹ʤȡ¿ʬʴ

21 ˡ(ܺ٤͡Ǥ)

EM DC Τ줾αĹθ P Ȥäƹͤ롧#42029#42042
BCDE ʿԤ̤ N CD ¦ƹͤ롧#42034 (ʤǤƤʤǤ)
C ABCF Ĺˤʤ褦 F äƹͤ롧#42035#42037#42038#42039

ʿ̤β¦ΩΤѤˡ(ʤϾܺ٤ǤƤʤΤ¿Ǥ)

ΩΤʬ䡧#42023#42034#42037#42038#42039
礭ΩΤ;ʬʬ#42025#42029#42042
ʿ̤ξ¦Τ#42028#42035

ʤ˽񤤤褦ˡܺ٤Ϥ褯ʬʤΤ¿ƱʬäƤƤܺ٤ϰۤʤäƤǽ⤤Ǥ

Ūˤϡ
EM DC ĹˡĹABCFäľΡˡդ꤬
Ūʬ䤹ʡȻפäƤޤ
ͥνȡ 712ڡ 17:31:44 42040
kata
uchinyan꤬Ȥޤ
äȤ狼ޤ
710ڡ 18:16:31 42041
Ϸʼ
޷϶ǤΤ褦ʲ⤫Ӥޤ

ţͤȣģäαĹƱΤθФȤ
ѿʣΡݣţУġˤϻͳѿʣݣ£ãģšˤΣ/Ǥ
ѣ£ţãġУģŤǹ⤵/
ΣФȣäθѤȤ
£äȣѤεΥϣǤ
ѿʣΡݣУģšˡݡʣѡУã͡ˤǤ
ݣߣᣵȤʤޤ
ʡ 711ʶ 8:50:24 42042
Ф
̤ʿԻշλͳѿʤߤ5/12ˤʤ褦Ǥ̤͡Ƚ񤯤Τ˶ϫޤ
712ڡ 19:33:58 42043
ޤ
5/12̲ᡣͤƤ5/12ˤʤΤ3֤ۤޤ
ϤߤʤȤۤƱǤ
714ʷ 15:47:40 42044
fumio
Ϥ褦ޤϥåĤȴ㤤Ƥޤ
Ĥʤ𤱤ʤȤۤۡǤ
βƸǤΤ꤭ޤ礦ǤϤǤϤޤ͡()
715ʲС 7:38:46 42045