Results 1 to 10 of 10
  1. #1
    5 Star Lounger
    Join Date
    Jan 2001
    Location
    La Jolla,CA
    Posts
    1,055
    Thanks
    11
    Thanked 35 Times in 34 Posts

    House of Mirrors -- find the angle

    The angle at which light strikes a mirror is equal in measure to the angle at which it is reflected. In the Hall of Mirror below, what is the measure of the angle indicated by the question mark?
    Attached Images Attached Images

  2. Subscribe to our Windows Secrets Newsletter - It's Free!

    Get our unique weekly Newsletter with tips and techniques, how to's and critical updates on Windows 7, Windows 8, Windows XP, Firefox, Internet Explorer, Google, etc. Join our 480,000 subscribers!

    Excel 2013: The Missing Manual

    + Get this BONUS — free!

    Get the most of Excel! Learn about new features, basics of creating a new spreadsheet and using the infamous Ribbon in the first chapter of Excel 2013: The Missing Manual - Subscribe and download Chapter 1 for free!

  3. #2
    5 Star Lounger Maudibe's Avatar
    Join Date
    Aug 2010
    Location
    Pa, USA
    Posts
    1,107
    Thanks
    39
    Thanked 197 Times in 184 Posts

  4. #3
    5 Star Lounger
    Join Date
    Jan 2001
    Location
    La Jolla,CA
    Posts
    1,055
    Thanks
    11
    Thanked 35 Times in 34 Posts
    Maudibe, you had your Wheaties.

    Did you see this quickly or take the long, find several angles, approach?

  5. #4
    5 Star Lounger Maudibe's Avatar
    Join Date
    Aug 2010
    Location
    Pa, USA
    Posts
    1,107
    Thanks
    39
    Thanked 197 Times in 184 Posts
    Actually, finding all the angels went fast as long as you remember 2 rules of angles for different shapes.

    That was a good one KW!


  6. #5
    4 Star Lounger access-mdb's Avatar
    Join Date
    Dec 2009
    Location
    Oxfordshire, UK
    Posts
    505
    Thanks
    50
    Thanked 38 Times in 35 Posts
    I didn't see any pins for angels to dance on in the diagram.

  7. #6
    5 Star Lounger
    Join Date
    Jan 2001
    Location
    La Jolla,CA
    Posts
    1,055
    Thanks
    11
    Thanked 35 Times in 34 Posts
    Here's an "explanation" with some pins...
    Attached Images Attached Images

  8. #7
    4 Star Lounger access-mdb's Avatar
    Join Date
    Dec 2009
    Location
    Oxfordshire, UK
    Posts
    505
    Thanks
    50
    Thanked 38 Times in 35 Posts
    Oops, my ability to see spelling errors out of the corner of my eye has tripped me up again. I was actually referring to Maud's misspelling of angles as angels, hence the reference to pins and dancing. I can be very obscure....

  9. #8
    5 Star Lounger
    Join Date
    Jan 2001
    Location
    La Jolla,CA
    Posts
    1,055
    Thanks
    11
    Thanked 35 Times in 34 Posts
    Actually, I suspect Maud DID find angels when calculating all of the angles. Maud quickly came up with the correct solution that I can see Maud doing the dancing. Well, not really...

    Maud will chime in soon, I'm sure.

  10. #9
    5 Star Lounger Maudibe's Avatar
    Join Date
    Aug 2010
    Location
    Pa, USA
    Posts
    1,107
    Thanks
    39
    Thanked 197 Times in 184 Posts
    My head was in the clouds with this puzzle. Maybe that's why I was seeing angels. Thanks for the in-depth explantion KW

  11. #10
    New Lounger
    Join Date
    Nov 2013
    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts
    The angle is 70 degrees.

Posting Permissions

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