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#1 2006-11-03 03:39:15

Neha
Member
Registered: 2006-10-11
Posts: 173

Find X

aadzy2.gif


i cant scan teh shape that i have in my problem
so i copied a shape form the net that looks exactly liek the one i have.
not exactly but close.
so in my problem it looks like...i'll explain it to you in words and if you can understand that would be great .
line D is 2
line B is 8
line A is 10
and
line C is 4x

so we have to find x.
get me so far?

now teh diameter as i see it is > 4x + 2
chord as i see it is > 10 + 8
and radius i dont know could be 8 or 10

so help...
please


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#2 2006-11-03 03:48:30

Neha
Member
Registered: 2006-10-11
Posts: 173

Re: Find X

math2xr2.jpg


here is the scanned problem....i did it = )
can you guys help me
thanks

Last edited by Neha (2006-11-03 03:48:57)


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#3 2006-11-03 06:42:15

Neha
Member
Registered: 2006-10-11
Posts: 173

Re: Find X

is it like this
8(10) = 2(4x)
80 = 16x
x = 5


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#4 2006-11-03 08:42:54

Zhylliolom
Real Member
Registered: 2005-09-05
Posts: 412

Re: Find X

This is the solution

findx.gif

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#5 2006-11-03 14:09:44

George,Y
Member
Registered: 2006-03-12
Posts: 1,379

Re: Find X

you want results so early that you pass on essential mid procedures. You should name the important points first, otherwise other people may not understand you.
The second one, the solution is:
name the points like this
  A       C
       E
B          D

Apparently, <AEB=<CED
Since <BAD <BCD are facing the same arc (BD)
<BAD=<BCD
Thus △AED is similar to △CED
AE:CE=BE:DE
10:2=4x:8
2(4x)=10(8)
x=10
4x=40


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#6 2006-11-04 03:59:16

Neha
Member
Registered: 2006-10-11
Posts: 173

Re: Find X

ok as you said that
AE     BE
--- = ----
CE     DE

AE * DE = CE * BE
10 * 2 = 4x * 8
now that doesn't look right......
and you dont get x = 10 by teh way you showed me.

if you have to get x = 10
then this is teh way you have to write it :

AE    DE
--- = ---
CE    BE
meaning
10/2 = 4x/8
thats how you get x=10

THANKS ANYWAYS
and the way i did it ...thats the same way but i made a mistake on writing 16 instead of 8
smile


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#7 2006-11-04 23:01:57

George,Y
Member
Registered: 2006-03-12
Posts: 1,379

Re: Find X

Uh, I used ":" as "/", but your textbook may not allow this symbol.


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