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Mathematics 16 Online
OpenStudy (anonymous):

WILL GIVE MEDAL HELP

OpenStudy (anonymous):

OpenStudy (mathmale):

Please, take a good, long look at the problem yourself, and think about what y ou already know and what you need to know in order to come up with a correct answer. After you've done that, then you're ready to ask for help.

OpenStudy (anonymous):

Is it B?

OpenStudy (anonymous):

@mathmale

OpenStudy (mathmale):

Please show me what you've done...how did you decide on "B"?

OpenStudy (anonymous):

I just figured it had to be smaller to be proportional.

OpenStudy (mathmale):

That gut reaction is correct, but you'll need to use math to find the correct answer anyway. The subject here is "proportion." How much larger or smaller is the triangle on the right in comparison with the triangle on the left?

OpenStudy (mathmale):

Need a quantitative answer.

OpenStudy (anonymous):

its 3 ft smaller

OpenStudy (mathmale):

the smaller triangle is smaller by what proportion?

OpenStudy (anonymous):

i dont know

OpenStudy (mathmale):

Hint: compare sides PQ and AB.

OpenStudy (mathmale):

What is the numeric ratio of side AB to side PQ?

OpenStudy (anonymous):

6:9

OpenStudy (mathmale):

\[\frac{ side AB }{ side PQ }=numeric. ratio=?\]

OpenStudy (mathmale):

which triangle is the larger?

OpenStudy (anonymous):

pq

OpenStudy (mathmale):

pq is a side of the larger triangle. It's the triangle on the left that is larger. And by comparing sides AB and PQ, you have found a ratio of 6:9. That is correct. Can you use this ratio, 6:9, to find the correct lengh of side CA?

OpenStudy (mathmale):

Hint: will the length of side CA be greater or smaller than the length of side PR?

OpenStudy (anonymous):

smaller

OpenStudy (mathmale):

Good. So, if the length of side PR is 7.5 feet, what is the correct length of side AC?

OpenStudy (mathmale):

You must use y our proportion to answer this.

OpenStudy (anonymous):

3

OpenStudy (mathmale):

I've twice calculated the length of side CA; it is not 3. How did you get 3?

OpenStudy (mathmale):

Use the proportion you have in hand. Show how you get the length of sside AC.

OpenStudy (mathmale):

I'm sorry, I lost my Internet connection.

OpenStudy (mathmale):

Did not mean to abandon you.

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