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Mathematics 8 Online
OpenStudy (anonymous):

Jason wants to walk the shortest distance to get from the parking lot to the beach. a. How far is the spot on the beach from the parking lot? b. How far will he have to walk from the parking lot to get to the refreshment stand?

OpenStudy (anonymous):

OpenStudy (jdoe0001):

http://www.mathwarehouse.com/geometry/similar/triangles/geometric-mean.php <--- check the SIMILAR triangles, and do the same as you did in the previous with similar figures

OpenStudy (anonymous):

So would the equation be \[\frac{ 18 }{ x } = \frac{ x }{ 32 }\]

OpenStudy (anonymous):

and then would I cross multiply \[x^{2} = 576\]

OpenStudy (anonymous):

so \[x = 24\]

OpenStudy (anonymous):

How would I answer a and b?

OpenStudy (jdoe0001):

x = 24, yes well you found "x" so look at the picture, x = "distance from parking to beach" y = " distance from parking to refreshments"

OpenStudy (anonymous):

So a is 24m?

OpenStudy (jdoe0001):

"x" is 24m, yes

OpenStudy (anonymous):

Would b. be\[24 + 32 = 56 \] then?

OpenStudy (anonymous):

wait no

OpenStudy (anonymous):

How would I find y?

OpenStudy (jdoe0001):

look at the medium-size and largest-size triangles, one could say that \(\bf \cfrac{y}{32+18}=\cfrac{32}{{\color{blue}{ x}}}\implies \cfrac{y}{32+18}=\cfrac{32}{{\color{blue}{ 24}}}\)

OpenStudy (jdoe0001):

hmmm wait

OpenStudy (jdoe0001):

I mixed up a few things there darn hehehh \(\bf \cfrac{y}{32+18}=\cfrac{32}{y}\implies \cfrac{y}{32+18}=\cfrac{32}{y}\)

OpenStudy (jdoe0001):

though I must say, both will work :)

OpenStudy (jdoe0001):

anyhow, I intended to use the middle and longest one =)

OpenStudy (anonymous):

\[\frac{ 50 }{ y }=\frac{ y }{ 32 }\] Then I would cross multiply \[y^{2} = 1600\] \[y = \sqrt{1600}\] \[y = 40\] Would that work?

OpenStudy (jdoe0001):

Would that work? \(\large \checkmark\)

OpenStudy (anonymous):

:D yay thank you

OpenStudy (jdoe0001):

yw

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