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  1. 09-28-2006, 05:59 PM #1
    ShooterMcGavin
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    Default Geometry Brainteaser

    Solve this problem using elementary geometry rules only, no trig(law of sines/cosines etc).

    Solve for the angle a.
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  2. 09-28-2006, 06:10 PM #2
    rickgiblin
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    80 degreese... i think
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  3. 09-28-2006, 06:10 PM #3
    rickgiblin
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    yea, am i rite?
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  4. 09-28-2006, 06:13 PM #4
    ShooterMcGavin
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    ^^^not even close...
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  5. 09-28-2006, 06:13 PM #5
    DJ XtRaK©
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    30?

    EDIT: I DID ALL OF THE WORK AND LAWS ON IT! SO THE "?" IS ASKING TO SEE IF IT IS RIGHT!
    Last edited by DJ XtRaK©; 09-28-2006 at 06:19 PM.
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  6. 09-28-2006, 06:16 PM #6
    Doppelgänger
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    30*

    If its 30.. i get it right because i didnt have a "?" next to my answer
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  7. 09-28-2006, 06:19 PM #7
    DJ XtRaK©
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    Quote Originally Posted by DropTopDrifter
    30*

    If its 30.. i get it right because i didnt have a "?" next to my answer
    refer to my post....!
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  8. 09-28-2006, 06:23 PM #8
    Doppelgänger
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    Quote Originally Posted by DJ XtRaK©
    refer to my post....!

    I had my reply to that before you edited it
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  9. 09-28-2006, 06:17 PM #9
    uproot
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    20, 25?
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  10. 09-28-2006, 06:21 PM #10
    Hulud
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    i answered the wrong angle lol
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  11. 09-28-2006, 06:21 PM #11
    ironchef
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    Hes right the answer is 30.

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  12. 09-28-2006, 06:22 PM #12
    ATK_Designs
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    Could be any number.

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  13. 09-28-2006, 06:22 PM #13
    Cato ED-6
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    I'm guessing 40. but I'm still thinking.

    Edit: is the awnser really 30?

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  14. 09-28-2006, 06:23 PM #14
    Doppelgänger
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    oh yeah... BLAM... heres how i got it!!!

    Last edited by DropTopDrifter; 09-28-2006 at 06:28 PM.
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  15. 09-28-2006, 06:24 PM #15
    ShooterMcGavin
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    Quote Originally Posted by DropTopDrifter
    oh yeah... BLAM... heres how i got it!!!

    and HOW did you get that?
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  16. 09-28-2006, 06:27 PM #16
    ironchef
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    Quote Originally Posted by shagwAg3n
    and HOW did you get that?
    Simple.

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  17. 09-28-2006, 06:24 PM #17
    ShooterMcGavin
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    ANSWER IS NOT 30, are any of you actually working this out?
    Last edited by ShooterMcGavin; 09-28-2006 at 06:35 PM.
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  18. 09-28-2006, 06:25 PM #18
    DJ XtRaK©
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    guess what....i got it right first bro! DONT MESS WITH A MATH MAJOR DUDE!
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  19. 09-28-2006, 06:31 PM #19
    Doppelgänger
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    Quote Originally Posted by DJ XtRaK©
    guess what....i got it right first bro! DONT MESS WITH A MATH MAJOR DUDE!
    yeah..well... i havent exercised what i learned in school in years... been 7 yrs since i have been in a classroom...
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  20. 09-28-2006, 06:40 PM #20
    DJ XtRaK©
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    Quote Originally Posted by DropTopDrifter
    yeah..well... i havent exercised what i learned in school in years... been 7 yrs since i have been in a classroom...
    you coming out tonight? if you do i going to bring my calculator and hit you with it!
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  21. 09-28-2006, 06:27 PM #21
    Doppelgänger
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    i fixed the angle that was missing..
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  22. 09-28-2006, 06:27 PM #22
    rickgiblin
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    ooo... sorry, i answered for the wrong "a"... this question was misleading, i want a nother question...lol. but i thought you ment the blue a on the outside of the triangle
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  23. 09-28-2006, 06:29 PM #23
    uproot
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    the one outside of the triangle is "A", not "a"
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  24. 09-28-2006, 06:29 PM #24
    Doppelgänger
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    okok.. i forgot another angle in my mad paint skills... but its all fixed now.

    so verify that i did it right...
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  25. 09-28-2006, 06:36 PM #25
    ShooterMcGavin
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    this is not as simple as y'all think, i promise, i spent 30 min on it and couldn't figure out the last part (mathematically, i ended up getting it through trial and error).
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  26. 09-28-2006, 06:39 PM #26
    ATK_Designs
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    By using simple adding and subtracting, it could be any combination of numbers (for the last part if you know what I'm talking about).

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  27. 09-28-2006, 06:39 PM #27
    DJ XtRaK©
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    SO WHATS THE FUCKING ANSWER!?!?
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  28. 09-28-2006, 06:47 PM #28
    ShooterMcGavin
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    answer is 20
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  29. 09-28-2006, 06:48 PM #29
    Cato ED-6
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    Quote Originally Posted by shagwAg3n
    answer is 20
    could you explain?

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  30. 09-28-2006, 06:56 PM #30
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    well u can use basics of geometry to figure out all the angles pretty much. but i got left with angle cdb = 140 and cea = 150. from there i couldn't figure it out mathematically anymore and just used trial and error to get the correct angles that make up cdb and cea.
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  31. 09-28-2006, 07:05 PM #31
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    did you get this from a website or was it a problem someone just gave you?
    if its a site, could you give me it, I would like to see how they did it in full.

    You're pretty smart man.

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  32. 09-28-2006, 07:30 PM #32
    ShooterMcGavin
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    Quote Originally Posted by Lord Canti
    did you get this from a website or was it a problem someone just gave you?
    if its a site, could you give me it, I would like to see how they did it in full.

    You're pretty smart man.
    i got this from another forum i frequent, still waiting for the "official" answer. i wish i could claim i was smart but i didn't get it the way i was supposed to
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  33. 09-28-2006, 07:25 PM #33
    ~The_Duke~
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    Quote Originally Posted by shagwAg3n
    well u can use basics of geometry to figure out all the angles pretty much. but i got left with angle cdb = 140 and cea = 150. from there i couldn't figure it out mathematically anymore and just used trial and error to get the correct angles that make up cdb and cea.
    but with out trail and error you wouldnt have been able to figure it out...trail and error if I am not mistaken isnt a geometry tatic it is an alg one...so
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  34. 09-28-2006, 07:29 PM #34
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    ^^^i already admitted that, thnx for pointing that out again geniOus...
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  35. 09-28-2006, 07:35 PM #35
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    Quote Originally Posted by shagwAg3n
    ^^^i already admitted that, thnx for pointing that out again geniOus...
    damn...leave me alone I cant pass precal to save my life...
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  36. 09-28-2006, 07:41 PM #36
    ShooterMcGavin
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    ^^^rofl, just stick to ur nightshifts dammit
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  37. 09-28-2006, 07:42 PM #37
    Ran
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    Math f*cking sucks. Primarily because I'm horrible at it and because 85% of it is worthless sh*t I'll never get to use.
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  38. 09-28-2006, 08:03 PM #38
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    Quote Originally Posted by Ran Kizama
    Math f*cking sucks. Primarily because I'm horrible at it and because 85% of it is worthless sh*t I'll never get to use.
    an azn bad at math? wtf is wrong w/u?
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  39. 09-28-2006, 08:06 PM #39
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    Quote Originally Posted by shagwAg3n
    an azn bad at math? wtf is wrong w/u?
    There is a line in a steven lynch song that prolly happened to him when he was small...

    "momma dropped him on his head, now he thinks he is a peice of bread"

    either that or his math teachers have always worn lots of perfume and he just pasted out when they walked into the room...

    VVVVV pic of my answer
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  40. 09-28-2006, 07:45 PM #40
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    One answer that works is 50

    I am going to list out all the angles...

    oh I called the intersection point of lines DB & EA point F...
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