Question

MEDAL FOR ACTUAL HELP:
I need someone to set up the proportion or guide me to it and i think i can solve it from there

Answer 1

The same procedure is applied . If two figures are similar, then 1 given side of the first is in ratio with the other given side of the other figure, got that?

Answer 2

,-, noo.... haha let me give it a shot though
3*(x+3)=4*2x

Answer 3

First find x:
3/x+3= 4/2x
Cross multiply
6x=4x+12
2x=12
x=6

Now just make another proportion, calling EF y, replacing x with 6
3/x+3=5/y
3/6+3=5/y
3/9=5/y
Cross multiply
3y=45
y=15

Answer 4

you could try thinking: little "is to" big
or the fraction
\[ \frac{little}{big} \]
where little is the side of the small triangle and big is the *corresponding* side of the big triangle.

Answer 5

you can write 3 different "fractions"
two of them are useful

Answer 6

http://openstudy.com/code-of-conduct thanks for the help but plese do not just give out answers :)

Answer 7

and okay trying that now Phi

Answer 8

3/(x+3)=4/2*x

Answer 9

yes. once you have that, you move into "solve mode"

Answer 10

one way is to first "cross multiply"
(there are other ways, btw)

Answer 11

http://www.cymath.com/answer.php?q=3%2F(x%2B3)%3D4%2F2*x

Answer 12

@iGreen

Answer 13

@phi

Answer 14

your software interpreted the 2x the wrong way
to get the correct answer, type in
3/(x+3)=4/(2x)

Answer 15

so 6

Answer 16

B :)

Answer 17

though it would be better to work the problem by hand, because later math courses they will assume you can do this kind of work "in your sleep"

you get x=6
but read the question carefully. what do they want to know ?

Answer 18

oh right.... 2*6= 12

Answer 19

so my answer comes to 12

Answer 20

yes, the side DF of the big triangle is 12