Mathematics
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OpenStudy (anonymous):
Math HW help! @Clalgee help!
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OpenStudy (clalgee):
Hi! What can I do for you?
OpenStudy (anonymous):
Give me a second and I will post the question.
OpenStudy (clalgee):
Alright.
OpenStudy (anonymous):
Alright so here we go.
BH is perpendicular to AC. Find x the length of BC.
OpenStudy (anonymous):
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OpenStudy (clalgee):
Alright, so do you know where to start?
OpenStudy (anonymous):
Negative Sherlock.
OpenStudy (clalgee):
Ok. I will help you start off.
BH perpendicular to AC means that triangles ABH and HBC are right triangles, am I right?
OpenStudy (anonymous):
Your right.
OpenStudy (clalgee):
So that means that : tan(39*) = 11 / AH or AH = 11 / tan(39*)
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OpenStudy (clalgee):
So now, fill in the blanks.
? = ? - AH = 19 - ? / tan(39*)
OpenStudy (anonymous):
HC I think. 19. and 11?
OpenStudy (clalgee):
Perfect! So now we will set these of to the side for now.
OpenStudy (clalgee):
Pythagora's theorem applied to right triangle HBC: \[11^ 2+HC=X^2\]
OpenStudy (clalgee):
Do you think you can solve for X?
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OpenStudy (anonymous):
No.... :(
OpenStudy (clalgee):
Aw, just give it a try. Give it your best go!
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
x = sqrt [ 112 + (19 - 11 / tan(39o) )2 ]
OpenStudy (clalgee):
O.o Wow! You didn't even need my help! great job! What will that give you?
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OpenStudy (anonymous):
Haha! But I didn't even know where to start!
and I think its 12
OpenStudy (clalgee):
Close! You have to round it by the 3rd number. Now what would your answer be?
OpenStudy (anonymous):
12.3!!
OpenStudy (clalgee):
Yes! NIce job! You did an awesome job!
OpenStudy (anonymous):
Thank yo sooo much! Your a lifesaver!