anonymous
  • anonymous
What is the height of the building? 180 m 51.96 m 155.88 m 60 m
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
is there a pic
anonymous
  • anonymous
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anonymous
  • anonymous

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anonymous
  • anonymous
I got 51.96 m
jdoe0001
  • jdoe0001
|dw:1435706847453:dw| recall your SOH CAH TOA -> \(\large tan(\theta)=\cfrac{opposite}{adjacent}\)
anonymous
  • anonymous
|dw:1435706202079:dw|
jdoe0001
  • jdoe0001
\(\bf tan(\theta)=\cfrac{opposite}{adjacent}\implies tan(\theta)\cdot adjacent=opposite\)
anonymous
  • anonymous
H=90/3√×3√3\[H=\frac{ 90 }{ \sqrt{3}}×\frac{ \sqrt{3} }{ 3 }=30\sqrt{3}\]√=303√
anonymous
  • anonymous
dont mind the H=903√×3√3 or the √=303√
jdoe0001
  • jdoe0001
well... is also a 30-60-90 triangle.. thus you could also use the 30-60-90 rule -> http://nanharbison.com/sats/math_images/30_60_90.gif
anonymous
  • anonymous
so D?
anonymous
  • anonymous
i got B
jdoe0001
  • jdoe0001
|dw:1435707245750:dw|
anonymous
  • anonymous
I just did the formula and got 90
anonymous
  • anonymous
I think I had the right answer before, did I?
jdoe0001
  • jdoe0001
@CaptainLlama49 what did you get?
anonymous
  • anonymous
Scroll up
jdoe0001
  • jdoe0001
90?
anonymous
  • anonymous
All the way up, to the beginning.
jdoe0001
  • jdoe0001
51.96?
anonymous
  • anonymous
yes :)
anonymous
  • anonymous
Was that right?
anonymous
  • anonymous
Ik thats what @Marcorie got
jdoe0001
  • jdoe0001
ahermm nope
anonymous
  • anonymous
What did you get?
anonymous
  • anonymous
no i got 51.96
anonymous
  • anonymous
yea i got the same thing @Marcorie
jdoe0001
  • jdoe0001
lemme use the 30-60-90 rule |dw:1435707545721:dw|
anonymous
  • anonymous
nope its actually B i know that for a fact
anonymous
  • anonymous
http://prntscr.com/4sim9t
anonymous
  • anonymous
jdoe0001
  • jdoe0001
hmm
jdoe0001
  • jdoe0001
hold the mayo
jdoe0001
  • jdoe0001
anyhow.. I see the mistake the 30 degree angle makes the shorter side, thus "x"
jdoe0001
  • jdoe0001
|dw:1435708058181:dw|
jdoe0001
  • jdoe0001
\(\bf x\sqrt{3}=90\implies x=\cfrac{90}{\sqrt{3}}\)

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