Question

Need help

Answer 1

Question

Answer 2

U would divide this right?

Answer 3

what we can do is set it up as a proportion again so we have 72/2 = 6x /1 and then cross multiply.

Answer 4

so when ever i am doing these problems i use the 2/1

Answer 5

ill draw a pic 1 sec

Answer 6

okay

Answer 7

oh okay thx

Answer 8

@brafacts: It's important that you state your goal in dealing with this problem.

Answer 9

cant i just do 72 divide by 6 becuse you will get 12 and its faster too

Answer 10

or does that only works sometimes?

Answer 11

You haven't yet defined what you're looking for, so how would you know whether or not you've found the answer you wanted?

Answer 12

we are looking for x

Answer 13

that's better. How is 6x related to 72 in this diagram?

Answer 14

thye are congurent

Answer 15

you can set it up like this right 72=6x

Answer 16

72 and 6x are not congruent. Better re-think that statement.

Answer 17

i mean the shape are the got the lines

Answer 18

the large triangle and the small one are NOT congruent. They are SIMILAR, however.

I ask you again: Based upon this drawing, how are 72 and 6x related?

Answer 19

thy are parallel

Answer 20

That's correct, but their being parallel doesn't help you much in finding the value of x.

How is length 72 related to length 6x?

Answer 21

u can put an equal sign in the middle because they are on the same side

Answer 22

Let's take a different perspective. Are the 2 triangles of the same size?

Answer 23

no

Answer 24

How much bigger is the larger triangle than the smaller one?

Answer 25

72 times

Answer 26

Actually, you had the answer to that question earlier.

The ratio of (larger triangle) to (smaller triangle) is 2:1.

Answer 27

therefore, 6x is 1/2 of what?

Answer 28

12x

Answer 29

We are comparing the vertical side of length 72 to the vertical side of length 6x.

We seem to agree that 72 is not the same as 6x.

Then, how is 6x related to 72, or how is 72 related to 6x?

Answer 30

its enlarged

Answer 31

its only similar

Answer 32

its bigger by 12 times

Answer 33

The larger altitude is twice the smaller altitude.

How would you write an equation showing the relationship between 72 and 6x?

Unfortunately, 12x would be incorrect; the larger triangle here is only twice as large as the smaller one, not 12 times larger.

Answer 34

72=6x?

Answer 35

But 72 is the height of the larger triangle. We've already seen that this height is twice the height of the smaller triangle.

What's half of 72?

Answer 36

36

Answer 37

36 is the height of the smaller triangle.

Can you now write an equation relating 36 and 6x?

Answer 38

Both 36 and 6x refer to the altitude of the smaller triangle, right?

Answer 39

yes

Answer 40

then how are 36 and 6x related?