Page 1 of 2 12 LastLast
Results 1 to 40 of 52

Thread: Geometry Brainteaser

  1. 09-28-2006, 05:59 PM #1
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default Geometry Brainteaser

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

    Solve for the angle a.
    Attached Thumbnails Attached Thumbnails -triangle1-gif  
    Reply With Quote Reply With Quote
  2. 09-28-2006, 06:10 PM #2
    rickgiblin
    rickgiblin is offline
    NANNERPUSS
    Join Date
    Dec 2003
    Location
    winder, GA
    Age
    40
    Posts
    3,933
    Rep Power
    26

    Default

    80 degreese... i think
    Reply With Quote Reply With Quote
  3. 09-28-2006, 06:10 PM #3
    rickgiblin
    rickgiblin is offline
    NANNERPUSS
    Join Date
    Dec 2003
    Location
    winder, GA
    Age
    40
    Posts
    3,933
    Rep Power
    26

    Default

    yea, am i rite?
    Reply With Quote Reply With Quote
  4. 09-28-2006, 06:13 PM #4
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    ^^^not even close...
    Reply With Quote Reply With Quote
  5. 09-28-2006, 06:13 PM #5
    DJ XtRaK©
    DJ XtRaK© is offline
    Senior Member | IA Veteran DJ XtRaK©'s Avatar
    Join Date
    Apr 2001
    Location
    Roswell
    Age
    41
    Posts
    7,506
    Rep Power
    32

    Default

    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.
    IA OG
    Reply With Quote Reply With Quote
  6. 09-28-2006, 06:16 PM #6
    Doppelgänger
    Doppelgänger is offline
    I'm not OK. Doppelgänger's Avatar
    Join Date
    Nov 2002
    Location
    wherever
    Age
    42
    Posts
    7,366
    Rep Power
    37

    Default

    30*

    If its 30.. i get it right because i didnt have a "?" next to my answer
    02' Miata



    Reply With Quote Reply With Quote
  7. 09-28-2006, 06:17 PM #7
    uproot
    uproot is offline
    iamgraphicdesign uproot's Avatar
    Join Date
    Mar 2005
    Location
    :noitacoL
    Age
    42
    Posts
    7,332
    Rep Power
    34

    Default

    20, 25?
    Reply With Quote Reply With Quote
  8. 09-28-2006, 06:19 PM #8
    DJ XtRaK©
    DJ XtRaK© is offline
    Senior Member | IA Veteran DJ XtRaK©'s Avatar
    Join Date
    Apr 2001
    Location
    Roswell
    Age
    41
    Posts
    7,506
    Rep Power
    32

    Default

    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....!
    IA OG
    Reply With Quote Reply With Quote
  9. 09-28-2006, 06:21 PM #9
    Hulud
    Hulud is offline
    Here and there Hulud's Avatar
    Join Date
    Mar 2005
    Location
    Omnipresent
    Age
    41
    Posts
    29,877
    Rep Power
    55

    Default

    i answered the wrong angle lol
    Val for President

    Reply With Quote Reply With Quote
  10. 09-28-2006, 06:21 PM #10
    ironchef
    ironchef is offline
    2.0TRawr ironchef's Avatar
    Join Date
    Feb 2004
    Location
    Atlanta, GA
    Age
    38
    Posts
    8,414
    Rep Power
    34

    Default

    Hes right the answer is 30.

    Reply With Quote Reply With Quote
  11. 09-28-2006, 06:22 PM #11
    ATK_Designs
    ATK_Designs is offline
    Senior Member
    Join Date
    Apr 2003
    Location
    ATL
    Age
    42
    Posts
    4,285
    Rep Power
    28

    Default

    Could be any number.

    Reply With Quote Reply With Quote
  12. 09-28-2006, 06:22 PM #12
    Cato ED-6
    Cato ED-6 is offline
    USAF Security Force Cato ED-6's Avatar
    Join Date
    May 2006
    Location
    Acworth & Woodstock area
    Age
    35
    Posts
    924
    Rep Power
    20

    Default

    I'm guessing 40. but I'm still thinking.

    Edit: is the awnser really 30?

    Parts for sale:
    http://www.importatlanta.com/forums/...6#post38259246
    Reply With Quote Reply With Quote
  13. 09-28-2006, 06:23 PM #13
    Doppelgänger
    Doppelgänger is offline
    I'm not OK. Doppelgänger's Avatar
    Join Date
    Nov 2002
    Location
    wherever
    Age
    42
    Posts
    7,366
    Rep Power
    37

    Default

    oh yeah... BLAM... heres how i got it!!!

    Last edited by DropTopDrifter; 09-28-2006 at 06:28 PM.
    02' Miata



    Reply With Quote Reply With Quote
  14. 09-28-2006, 06:23 PM #14
    Doppelgänger
    Doppelgänger is offline
    I'm not OK. Doppelgänger's Avatar
    Join Date
    Nov 2002
    Location
    wherever
    Age
    42
    Posts
    7,366
    Rep Power
    37

    Default

    Quote Originally Posted by DJ XtRaK©
    refer to my post....!

    I had my reply to that before you edited it
    02' Miata



    Reply With Quote Reply With Quote
  15. 09-28-2006, 06:24 PM #15
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    ANSWER IS NOT 30, are any of you actually working this out?
    Last edited by ShooterMcGavin; 09-28-2006 at 06:35 PM.
    Reply With Quote Reply With Quote
  16. 09-28-2006, 06:24 PM #16
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    Quote Originally Posted by DropTopDrifter
    oh yeah... BLAM... heres how i got it!!!

    and HOW did you get that?
    Reply With Quote Reply With Quote
  17. 09-28-2006, 06:25 PM #17
    DJ XtRaK©
    DJ XtRaK© is offline
    Senior Member | IA Veteran DJ XtRaK©'s Avatar
    Join Date
    Apr 2001
    Location
    Roswell
    Age
    41
    Posts
    7,506
    Rep Power
    32

    Default

    guess what....i got it right first bro! DONT MESS WITH A MATH MAJOR DUDE!
    IA OG
    Reply With Quote Reply With Quote
  18. 09-28-2006, 06:27 PM #18
    Doppelgänger
    Doppelgänger is offline
    I'm not OK. Doppelgänger's Avatar
    Join Date
    Nov 2002
    Location
    wherever
    Age
    42
    Posts
    7,366
    Rep Power
    37

    Default

    i fixed the angle that was missing..
    02' Miata



    Reply With Quote Reply With Quote
  19. 09-28-2006, 06:27 PM #19
    ironchef
    ironchef is offline
    2.0TRawr ironchef's Avatar
    Join Date
    Feb 2004
    Location
    Atlanta, GA
    Age
    38
    Posts
    8,414
    Rep Power
    34

    Default

    Quote Originally Posted by shagwAg3n
    and HOW did you get that?
    Simple.

    Reply With Quote Reply With Quote
  20. 09-28-2006, 06:27 PM #20
    rickgiblin
    rickgiblin is offline
    NANNERPUSS
    Join Date
    Dec 2003
    Location
    winder, GA
    Age
    40
    Posts
    3,933
    Rep Power
    26

    Default

    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
    Reply With Quote Reply With Quote
  21. 09-28-2006, 06:29 PM #21
    uproot
    uproot is offline
    iamgraphicdesign uproot's Avatar
    Join Date
    Mar 2005
    Location
    :noitacoL
    Age
    42
    Posts
    7,332
    Rep Power
    34

    Default

    the one outside of the triangle is "A", not "a"
    Reply With Quote Reply With Quote
  22. 09-28-2006, 06:29 PM #22
    Doppelgänger
    Doppelgänger is offline
    I'm not OK. Doppelgänger's Avatar
    Join Date
    Nov 2002
    Location
    wherever
    Age
    42
    Posts
    7,366
    Rep Power
    37

    Default

    okok.. i forgot another angle in my mad paint skills... but its all fixed now.

    so verify that i did it right...
    02' Miata



    Reply With Quote Reply With Quote
  23. 09-28-2006, 06:31 PM #23
    Doppelgänger
    Doppelgänger is offline
    I'm not OK. Doppelgänger's Avatar
    Join Date
    Nov 2002
    Location
    wherever
    Age
    42
    Posts
    7,366
    Rep Power
    37

    Default

    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...
    02' Miata



    Reply With Quote Reply With Quote
  24. 09-28-2006, 06:36 PM #24
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    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).
    Reply With Quote Reply With Quote
  25. 09-28-2006, 06:39 PM #25
    ATK_Designs
    ATK_Designs is offline
    Senior Member
    Join Date
    Apr 2003
    Location
    ATL
    Age
    42
    Posts
    4,285
    Rep Power
    28

    Default

    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).

    Reply With Quote Reply With Quote
  26. 09-28-2006, 06:39 PM #26
    DJ XtRaK©
    DJ XtRaK© is offline
    Senior Member | IA Veteran DJ XtRaK©'s Avatar
    Join Date
    Apr 2001
    Location
    Roswell
    Age
    41
    Posts
    7,506
    Rep Power
    32

    Default

    SO WHATS THE FUCKING ANSWER!?!?
    IA OG
    Reply With Quote Reply With Quote
  27. 09-28-2006, 06:40 PM #27
    DJ XtRaK©
    DJ XtRaK© is offline
    Senior Member | IA Veteran DJ XtRaK©'s Avatar
    Join Date
    Apr 2001
    Location
    Roswell
    Age
    41
    Posts
    7,506
    Rep Power
    32

    Default

    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!
    IA OG
    Reply With Quote Reply With Quote
  28. 09-28-2006, 06:47 PM #28
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    answer is 20
    Reply With Quote Reply With Quote
  29. 09-28-2006, 06:48 PM #29
    Cato ED-6
    Cato ED-6 is offline
    USAF Security Force Cato ED-6's Avatar
    Join Date
    May 2006
    Location
    Acworth & Woodstock area
    Age
    35
    Posts
    924
    Rep Power
    20

    Default

    Quote Originally Posted by shagwAg3n
    answer is 20
    could you explain?

    Parts for sale:
    http://www.importatlanta.com/forums/...6#post38259246
    Reply With Quote Reply With Quote
  30. 09-28-2006, 06:56 PM #30
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    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.
    Reply With Quote Reply With Quote
  31. 09-28-2006, 07:05 PM #31
    Cato ED-6
    Cato ED-6 is offline
    USAF Security Force Cato ED-6's Avatar
    Join Date
    May 2006
    Location
    Acworth & Woodstock area
    Age
    35
    Posts
    924
    Rep Power
    20

    Default

    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.

    Parts for sale:
    http://www.importatlanta.com/forums/...6#post38259246
    Reply With Quote Reply With Quote
  32. 09-28-2006, 07:25 PM #32
    ~The_Duke~
    ~The_Duke~ is offline
    LNC FTW
    Join Date
    Feb 2006
    Location
    I'm up 'n Cummin'
    Age
    40
    Posts
    11,081
    Rep Power
    31

    Default

    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
    My YouTube Channel
    Make sure you "like" the videos purdy please.
    Reply With Quote Reply With Quote
  33. 09-28-2006, 07:29 PM #33
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    ^^^i already admitted that, thnx for pointing that out again geniOus...
    Reply With Quote Reply With Quote
  34. 09-28-2006, 07:30 PM #34
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    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
    Reply With Quote Reply With Quote
  35. 09-28-2006, 07:35 PM #35
    ~The_Duke~
    ~The_Duke~ is offline
    LNC FTW
    Join Date
    Feb 2006
    Location
    I'm up 'n Cummin'
    Age
    40
    Posts
    11,081
    Rep Power
    31

    Default

    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...
    My YouTube Channel
    Make sure you "like" the videos purdy please.
    Reply With Quote Reply With Quote
  36. 09-28-2006, 07:41 PM #36
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    ^^^rofl, just stick to ur nightshifts dammit
    Reply With Quote Reply With Quote
  37. 09-28-2006, 07:42 PM #37
    Ran
    Ran is offline
    Delightfully Creepy Ran's Avatar
    Join Date
    Sep 2005
    Location
    Kennesaw, Ga
    Posts
    19,885
    Rep Power
    46

    Default

    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.
    Reply With Quote Reply With Quote
  38. 09-28-2006, 07:45 PM #38
    ~The_Duke~
    ~The_Duke~ is offline
    LNC FTW
    Join Date
    Feb 2006
    Location
    I'm up 'n Cummin'
    Age
    40
    Posts
    11,081
    Rep Power
    31

    Default

    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...
    My YouTube Channel
    Make sure you "like" the videos purdy please.
    Reply With Quote Reply With Quote
  39. 09-28-2006, 07:55 PM #39
    ~The_Duke~
    ~The_Duke~ is offline
    LNC FTW
    Join Date
    Feb 2006
    Location
    I'm up 'n Cummin'
    Age
    40
    Posts
    11,081
    Rep Power
    31

    Default

    Angle CAB = 80
    Angle CBA = 80
    Angle ACB = 20
    Angle AEC = 10
    Angle EAB = 70
    Angle DBA = 60
    Angle AFB = 50
    Angle DFE = 50
    Angle DFA = 130
    Angle EFB = 130
    Angle ADB = 40
    Angle CDE = 60
    Angle AEB = 30
    Angle DEC = 100
    Angle BDE = 80

    Which in turn makes Angel a = 50

    If you add the values of AEB (30) + DEC (100) = 130 + 50 = 180
    My YouTube Channel
    Make sure you "like" the videos purdy please.
    Reply With Quote Reply With Quote
  40. 09-28-2006, 08:03 PM #40
    ShooterMcGavin
    ShooterMcGavin is offline
    Duck of Death ShooterMcGavin's Avatar
    Join Date
    Jun 2003
    Location
    right behind you...
    Age
    43
    Posts
    24,836
    Rep Power
    54

    Default

    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?
    Reply With Quote Reply With Quote
Page 1 of 2 12 LastLast
« Piercings? | i think we have found our new racing place..... in 2010 »

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

About us
ImportAtlanta is a community of gearheads and car enthusiasts. It does not matter what kind of car or bike you drive, IA is an open community for any gearhead. Whether you're looking for advice on a performance build or posting your wheels for sale, you're welcome here!
Announcement
Welcome back to ImportAtlanta. We are currently undergoing many changes, so please report any issues you encounter with the site using the 'Contact Us' button below. Thank you!