anonymous
  • anonymous
a painter leans a 20 ft. ladder against a building . to the nearest ft. how high on the building does the ladder reach?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
@NicolasRodriguez @Blaze @vt @theycallmeMJ @lncognlto
DebbieG
  • DebbieG
Aren't you missing a piece of information?
DebbieG
  • DebbieG
Is something said about the angle the ladder makes...? either with the ground, or the building? (maybe it's in a diagram?)

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More answers

anonymous
  • anonymous
no
anonymous
  • anonymous
nope i gave all the info
DebbieG
  • DebbieG
Interesting. Well, if that's the complete problem, then I don't think it can be solved. Your instructor forgot to include an important piece.
DebbieG
  • DebbieG
What class is this for?
DebbieG
  • DebbieG
trig?
anonymous
  • anonymous
its an online test i will copy and paste the question so u can c
anonymous
  • anonymous
yep
DebbieG
  • DebbieG
ok
anonymous
  • anonymous
. A painter leans a 20-ft ladder against a building. The base of the ladder is 12 ft from the building. To the nearest foot, how high on the building does the ladder reach
DebbieG
  • DebbieG
The base of the ladder is 12 ft from the building. That's VERY important. :)
DebbieG
  • DebbieG
|dw:1378737867996:dw|
DebbieG
  • DebbieG
You have a right triangle. You have a side of length 12 and a hypotenuse of length 20. How do you find the missing side, h?
DebbieG
  • DebbieG
|dw:1378737946041:dw|
anonymous
  • anonymous
cos ?
DebbieG
  • DebbieG
hmmmm.... well, if you knew an angle, cosine would be useful. But you don't, and you don't need it. It's just a right triangle. you have 2 sides, need the 3rd.
DebbieG
  • DebbieG
\(a^2 + b^2=c^2\)
anonymous
  • anonymous
so 20 wud b c right ?
DebbieG
  • DebbieG
Right... the ladder is the hypotenuse
anonymous
  • anonymous
and 12 is a ?
anonymous
  • anonymous
yes
DebbieG
  • DebbieG
a or b, makes no difference... you can call the 12 a, or call it b, then h is the other one.
DebbieG
  • DebbieG
as long as 12 and h are the 2 "legs" and 20 is the hypotenuse.
anonymous
  • anonymous
12^2+b^2=20^2
DebbieG
  • DebbieG
yes, good
DebbieG
  • DebbieG
now solve for b! :)
anonymous
  • anonymous
did you get 16?
DebbieG
  • DebbieG
I was waiting for him to tell us his answer.
anonymous
  • anonymous
im kinda stuck after i got 144+b^2=400
DebbieG
  • DebbieG
OK, now isolate the b^2... how do you do that?
DebbieG
  • DebbieG
You want to solve for b, so you need that term allll alone on one side.
anonymous
  • anonymous
now 400-144
DebbieG
  • DebbieG
\(\Large 144+b^2=400\)
anonymous
  • anonymous
did u sqrt 256
DebbieG
  • DebbieG
yes, do you see why??
anonymous
  • anonymous
yes
anonymous
  • anonymous
yes to find the answ .. and btw im a gurl llol
DebbieG
  • DebbieG
\(\Large 144+b^2=400\) \(\Large b^2=256\) \(\Large b=\pm\sqrt{256}\) You can ignore the negative answer, since this is a distance and can't be negative. :)
DebbieG
  • DebbieG
Oops, sorry... lol. so hard to tell from that "owl" picture.. :)
anonymous
  • anonymous
main thing about trigonometry is sin cos tan ,and pythagoras theorem
anonymous
  • anonymous
|dw:1378738501435:dw| FIND M angle E nearest degree
anonymous
  • anonymous
@DebbieG
anonymous
  • anonymous
@Blaze
anonymous
  • anonymous
Use sin ,cos , tan.
anonymous
  • anonymous
answer choices are 37 24 53 10
anonymous
  • anonymous
with what
anonymous
  • anonymous
37
anonymous
  • anonymous
is that the answer
anonymous
  • anonymous
yes
anonymous
  • anonymous
go to youtube to find out videos about trigonimetry
anonymous
  • anonymous
|dw:1378739017896:dw| in angle def , de=17 and m angle f=32 find df to nearest tenth
anonymous
  • anonymous
try it yourself now
anonymous
  • anonymous
@FaithAnderson1997
anonymous
  • anonymous
i need to knw how too set it up
anonymous
  • anonymous
@Blaze
DebbieG
  • DebbieG
Sorry I didn't respond earlier, but I had to go. @imani1993, please put each new question into a separate post.... it works much better that way, is less confusing, and you are more likely to get someone who can help you. :)

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