Wei Zhong ([info]goh_wz) wrote,
@ 2009-10-03 13:40:00
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Entry tags:chat logs, math

Sec 2 geometry

Math problem

Jon says (1:32 PM):
i think jodie's solution is correct
Wei Zhong says (1:32 PM):
same
i saw
haha arts student > 2 science students D:
Jon says (1:32 PM):
i sent to xinyu too
i also sent to my friend studying engineering or math or something in cornell
i feel so stupid
Wei Zhong says (1:33 PM):
so did they solve it ahead of jodie?
Jon says (1:33 PM):
heck no, they haven't solved it
Wei Zhong says (1:33 PM):
HAHA
this is so interesting
Jon says (1:34 PM):
i still feel so stupid =(
Wei Zhong says (1:34 PM):
i feel stupid too

(16 comments) - (Post a new comment)


[info]steelkokoro
2009-10-03 06:02 am UTC (link)
Lol friend. You realise I could only solve it because this is the kind of math I've been doing since arriving in Japan...

(Reply to this) (Thread)

[info]goh_wz
2009-10-03 06:04 am UTC (link)
respect.

(Reply to this) (Parent)(Thread)

[info]steelkokoro
2009-10-03 06:04 am UTC (link)
fun.

(Reply to this) (Parent)

[info]icyidiosyncrasy
2009-10-03 08:00 am UTC (link)
the 4, 3, 8 and 6, do they represent the length of the sides? O.O

(Reply to this) (Thread)

[info]goh_wz
2009-10-04 02:41 am UTC (link)
They are length of the sides, in units (not necessarily cm²)

(Reply to this) (Parent)

[info]iekodanus
2009-10-03 09:52 am UTC (link)
Let me try. Is it 9?

(Reply to this) (Thread)

[info]papmech
2009-10-03 02:03 pm UTC (link)
The answer invokes imaginary numbers.

(Reply to this) (Parent)

[info]alpha22
2009-10-03 01:35 pm UTC (link)
the principles involved are doable at sec 2...but this deserves a ** for demanding visual ability. which means a student like jon/you can do it. i'd expect both of you to be able to do it leh...

the answer is 6. i'm sure of it. :)

-liwei

ps i suspect there might be a theorem for this, because the method is generalizable. i certainly haven't learnt the theorem before.

(Reply to this) (Thread)

[info]goh_wz
2009-10-04 02:41 am UTC (link)
Wrong answer. D:

(Reply to this) (Parent)(Thread)

[info]alpha22
2009-10-04 06:36 am UTC (link)
not 6? want me to mail you my answer? don't tell me EA and DB aren't straight lines...

(Reply to this) (Parent)

[info]alpha22
2009-10-04 07:24 am UTC (link)
LOL oops. it IS 9. I thought DE = 0.5 AB...dumb.

(Reply to this) (Parent)(Thread)

[info]goh_wz
2009-10-04 03:18 pm UTC (link)
Haha and you cheated! D: First you said the answer is 4 and you're sure of it, then you deleted your comment and posted another, saying that the answer is 6 and you're sure of it. Don't think I don't know just because I've been offline yesterday afternoon ;)

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[info]alpha22
2009-10-05 12:51 am UTC (link)
hahahaha i made a careless mistake and corrected it fast enough. i know you know, but i surely wasn't guessing. i can even show you the proof for 9, and my explanation for getting 6 (that i thought the ratio between sides was 2 instead of 3) correctly explains my mistake.

surely you don't think i anyhow guessed. -.-

(Reply to this) (Parent)(Thread)

[info]goh_wz
2009-10-05 02:00 pm UTC (link)
haha relax nope i never thought you guessed, why did you think I think you guessed?

(Reply to this) (Parent)

[info]medievalface
2009-10-03 03:58 pm UTC (link)
Clearly this shows that our local curriculum needs more geometry. If you had participated in exchange programmes with Japanese high schools and actually sat through their Mathematics lessons, you would see what I mean.

(Reply to this)


[info]steelkokoro
2009-10-03 04:56 pm UTC (link)
Japanese maths is win.

However this implies that Sec 2 level math=High school level math in Japan.

Hm.

(Reply to this)

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