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Math Help?

Creator: screwblum November 1, 2011 7:08pm
Forums Off Topic Math Help?
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Jams XD
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I'm fairly certain that it's 36 degrees, but the explaination is quite lengthy. :\
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screwblum wrote:
Supposed to be a College level problem. I am confused, any help?



inb4: Yes this was made in paint. And I am quite sure it's not equilateral.



Let angle CAB be a
ABC be c
BCD be b
CDB be d

ACB=CAB
CBD=CDB

a+b = 180
b + 2d = 180
a + 2d + c = 180
2a + c = 180

four equations four unknowns. solve for d

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NinjaGinge
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I didnt take the time to check the math. 36 may be right. def not a college level problem. Geometry and systems of equations.
Credit goes to JEFFY40HANDS for this godly imposing Viktor
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NinjaGinge wrote:




Let angle CAB be a
ABC be c
BCD be b
CDB be d

ACB=CAB
CBD=CDB

a+b = 180
b + 2d = 180
a + 2d + c = 180
2a + c = 180

four equations four unknowns. solve for d

****, i did this kind of problem a year ago, shoulda payed attention in geometry Q_Q


Special thanks to Brynollf, -FanArt-, Xiaowiriamu (x3), Spooon, reppinFTC and jhoijhoi for making the awesome sigs :P
screwblum
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Permalink | Quote | PM | +Rep November 1, 2011 8:35pm | Report
It's not THAT ****py of a drawing. I traced the triangle (Put it over the screen). It is supposed to be leaning to the right a little if thats what your referring to.

Thank you WrathWaffleWarrior, spooon, L1LShadow, JEFFY40HANDS, jhoijhoi and palzm for the sigs :3
caucheka
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Permalink | Quote | PM | +Rep November 1, 2011 9:29pm | Report
wait, how is it supposed to be leaning to the right?

2 of the sides are the same thus making it isosceles, meaning angle a and b are the same
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caucheka
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Permalink | Quote | PM | +Rep November 1, 2011 9:39pm | Report
yep its 36.


good luck showing your work though on how to figure that out.
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screwblum
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Permalink | Quote | PM | +Rep November 1, 2011 9:56pm | Report
Thank you Cauch and everyone who helped. Ill try to figure out how you did that and right it down.

Thank you WrathWaffleWarrior, spooon, L1LShadow, JEFFY40HANDS, jhoijhoi and palzm for the sigs :3
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Permalink | Quote | PM | +Rep November 1, 2011 10:24pm | Report
You still haven't animated the picture and/or corrected the proportions in your first image. How are you suppose to pass if you don't have proportions right?
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Permalink | Quote | PM | +Rep November 2, 2011 2:12pm | Report
Solve the system of equations:



And


Find det(An)


Halp nao!
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