How-To Geek

Friday Fun: Test Your "Eyeballing" Skills

Have you ever put up a picture and just “eyeballed” it instead of using a level? Chances are you stepped back, and realized it was way off, and then had to fix it. That’s the basic idea of this surprisingly fun flash game, which tests your eyeballing skills.

If this game isn’t your style, you can check out GemCraft, our last Friday Fun, or browse through Mysticgeek’s archive of fun stuff.

Playing the Eyeballing Game

The basic idea is using your mouse to find the mid-point in a series of geometric shapes. For instance, in this one you need to move the mouse to the point where all of the lines would normally meet if they were to continue in the same path as the arrows.

Eyeballing Point of Convergence 

In this one, you have to adjust the lines to make a parallelogram…

Eyeballing Parallelogram

And here, you need to find the mid-point of the circle.

 Eyeballing Circle

This is the closest I ever got to being accurate…

Eyeballing Bisect Angle

Overall, I wasn’t too terribly great at this game – here are my results by category.

Eyeballing Results

At the end they tell you how well you did against the last 10,000 people that played it (completely anonymously)

Eyeballing Results Score

This is one of those games that you’ll never think is fun until you try. So how well did you do?

Play the Eyeballing Gaming on

Lowell Heddings, better known online as the How-To Geek, spends all his free time bringing you fresh geekery on a daily basis. You can follow him on if you'd like.

  • Published 01/23/09

Comments (11)

  1. Hatryst

    Cool! A must play for mathematicians!

  2. Eric

    great game; accurate to 0.0 units; oh yeah

  3. WOFall

    Parallelogram 4.1 1.4 3.6
    Midpoint 3.6 0.0 6.1
    Bisect angle 0.5 1.4 0.9
    Triangle center 4.0 5.7 2.0
    Circle center 3.2 5.1 5.8
    Right angle 21.4 16.2 15.5
    Convergence 4.0 4.1 3.0

    Average error: 5.31 (lower is better)

    Apparently the aspect ratio on my monitor is wrong, which causes the rather crappy ‘right angle’ score (which i drew perfectly ;) )

  4. B Banks

    Sweet! I was in the top 500 last games with an overall of 1.80 :D


  5. The Geek

    @B Banks:

    Well you beat me pretty soundly! I shall have to play again =)

  6. Soph

    This was surprisingly addictive! Love your Friday Fun posts :)

  7. James

    Oh man, I thought I left math behind when I graduated high school. Thanks for the new nightmares!

  8. charlene

    The right angle is not anywhere near to being 90 degrees. After playing a few times I decided to check it…not a right angle.

  9. charlene

    OOOPs…I just read the “aspect ratio” information. My mistake. ;-)

  10. sul2005tan

    great games I get 8.07 ..

  11. John

    @ James…

    High School? Heck! My son is doing this in 3rd grade elementary!!! Unbelieveable! Poor kids!!!!!

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