anonymous
  • anonymous
Using only elementary geometry, determine angle x. Provide a step-by-step proof. You may use only elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.). You may not use trigonomery, such as sines and cosines, the law of sines, the law of cosines, etc. There is a review of elementary geometry below. This is the hardest problem I have ever seen that is, in a sense, easy. It really can be done using only elementary geometry. This is not a trick question.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
NotTim
  • NotTim
Koala Bird, MEet Pengu.
anonymous
  • anonymous
1 Attachment
NotTim
  • NotTim
Koala Bird left.

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anonymous
  • anonymous
WHat?
anonymous
  • anonymous
uh..... DONT LEAVE????
NotTim
  • NotTim
Err. Start off nice an simple.
anonymous
  • anonymous
Koala Bird!!
NotTim
  • NotTim
The bottom triangle, a to b; you can find out the last angle knowing that the total angle fo a triangle is 180.
anonymous
  • anonymous
k
anonymous
  • anonymous
k
anonymous
  • anonymous
k
NotTim
  • NotTim
You can use that new angle to find out the angle that is on the other side of it, knowing that the total angle is also 180.
anonymous
  • anonymous
k
anonymous
  • anonymous
k
anonymous
  • anonymous
k
NotTim
  • NotTim
With that, you can use the new angle you got to find the angle beside it, in triangle DE (the small triangle for which you are seeking)
anonymous
  • anonymous
k
NotTim
  • NotTim
KOALA BIRD IS BACK
NotTim
  • NotTim
Er, whatever I'm thinking of, may be overcomplicating the question...
anonymous
  • anonymous
@Not Tim You got the answer?
NotTim
  • NotTim
Noo....
anonymous
  • anonymous
nooooo
NotTim
  • NotTim
I was thinking: USe all major angles to find the last major angle, and then use the angle collected previously in Triangle DA for the angle. And then Find the angle for Triangle EB. -In summary, find all angles.
NotTim
  • NotTim
But done I would only get 1 angle for Triangle CDE
NotTim
  • NotTim
Unless.
NotTim
  • NotTim
Pengu, did yo uget all the angles within the triangle that reaches---WAIT. NO
NotTim
  • NotTim
That wouldn't work, as I would need the angles with CDE...
NotTim
  • NotTim
Sorry. I reached the end of my useful line.
anonymous
  • anonymous
I find that triangle CDB is an isosceles triangle
JamesJ
  • JamesJ
Call the point where the lines AE and DB intersect F. Then the angle AFB = 180 - (70 + 60) = 50 => the angle DFA = 130 => ADF = 40 The angle DCE = 180 - (80 + 80) = 20 => CEA = 150 That should get you started.
NotTim
  • NotTim
Imma leave. Sniff.
babystar16
  • babystar16
hey mingkkool1.

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