# This rocks. \[Eyeballing Game\] **URL:** \ **Category:** The Game Room\ **Created:** [November 12, 2008, 9:42pm UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425 "2008-11-12T21:42:17Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Silver\_Tyger](https://avatars.discourse-cdn.com/v4/letter/s/fbc32d/32.png) [@Silver\_Tyger](https://boards.straightdope.com/u/Silver_Tyger)\ **Post date:** [November 12, 2008, 11:41pm UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/21 "2008-11-12T23:41:45Z")
Your inaccuracy by category: Parallelogram 15.5 1.4 8.0 Midpoint 1.4 1.4 5.0 Bisect angle 3.7 3.5 1.4 Triangle center 9.1 7.9 6.4 Circle center 2.0 4.2 2.0 Right angle 0.5 0.6 2.8 Convergence 16.0 2.2 10.8 Average error: 5.04 (lower is better) Not too bad. ---
**Author:** ![Larry\_Borgia](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/larry_borgia/32/156_2.png) [@Larry\_Borgia](https://boards.straightdope.com/u/Larry_Borgia)\ **Post date:** [November 12, 2008, 11:51pm UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/22 "2008-11-12T23:51:03Z")
Your inaccuracy by category: Parallelogram 15.6 4.5 10.8 Midpoint 8.6 6.3 1.4 Bisect angle 3.4 1.9 2.1 Triangle center 1.9 4.5 9.4 Circle center 4.5 6.3 3.0 Right angle 14.4 3.4 6.9 Convergence 7.0 4.5 12.1 Average error: 6.31 (lower is better) not bad. could do better. ---
**Author:** ![WhyNot](https://avatars.discourse-cdn.com/v4/letter/w/c77e96/32.png) [@WhyNot](https://boards.straightdope.com/u/WhyNot)\ **Post date:** [November 12, 2008, 11:57pm UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/23 "2008-11-12T23:57:51Z")
> [@Chronos](#): > > … “point equidistant from the sides” (which is really just “bisect the angle” again) … By gum, it is! I did not know that. Doing it again with that in mind and focusing on the angles instead of the sides dropped my average by 3 units on that one! Best score: 4.15, worst: 5.35. I blame a particularly nefarious parallelogram for that one. ---
**Author:** ![Shayna](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/shayna/32/17976_2.png) [@Shayna](https://boards.straightdope.com/u/Shayna)\ **Post date:** [November 13, 2008, 12:13am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/24 "2008-11-13T00:13:43Z")
Can I stop after only one run-through? 😃 Your inaccuracy by category: Parallelogram 6.4 ---- ---- Midpoint 1.0 ---- ---- Bisect angle 0.2 ---- ---- Triangle center 1.8 ---- ---- Circle center 3.0 ---- ---- Right angle 2.7 ---- ---- Convergence 0.0 ---- ---- \*\*Average error: 2.16 \*\* Ok, let’s see how much worse I can make it. . . ---
**Author:** ![Stealth\_Potato](https://avatars.discourse-cdn.com/v4/letter/s/d78d45/32.png) [@Stealth\_Potato](https://boards.straightdope.com/u/Stealth_Potato)\ **Post date:** [November 13, 2008, 12:16am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/25 "2008-11-13T00:16:52Z")
**Shayna** , you’re putting us all to shame. 😛 ---
**Author:** ![Shayna](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/shayna/32/17976_2.png) [@Shayna](https://boards.straightdope.com/u/Shayna)\ **Post date:** [November 13, 2008, 12:21am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/26 "2008-11-13T00:21:31Z")
Ayup. As I suspected. . . Parallelogram 6.4 3.6 11.4 Midpoint 1.0 3.6 3.0 Bisect angle 0.2 10.0 4.4 Triangle center 1.8 8.1 3.1 Circle center 3.0 1.4 3.0 Right angle 2.7 4.9 4.8 Convergence 0.0 1.4 2.2 **Average error: 3.81** I think I’ll stick with my first score of 2.93 and pretend this never happened. 😛 > [@Stealth\_Potato](#): > > **Shayna** , you’re putting us all to shame. 😛 Not so much anymore! 🙂 ---
**Author:** ![yanceylebeef](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/yanceylebeef/32/12290_2.png) [@yanceylebeef](https://boards.straightdope.com/u/yanceylebeef)\ **Post date:** [November 13, 2008, 12:21am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/27 "2008-11-13T00:21:59Z")
I’m more than a little embarrassed to admit…I had to look up parallelogram. It’s been a long time since math class. ---
**Author:** ![Baal\_Houtham](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/baal_houtham/32/13604_2.png) [@Baal\_Houtham](https://boards.straightdope.com/u/Baal_Houtham)\ **Post date:** [November 13, 2008, 12:36am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/28 "2008-11-13T00:36:30Z")
First time about 3.6, which made me check my monitor’s geometry settings. They were a little off and were giving me imperfect circles. Second time through, I racked up a 2.78. (I work in graphic design.) ---
**Author:** ![TroubleAgain](https://avatars.discourse-cdn.com/v4/letter/t/e480ec/32.png) [@TroubleAgain](https://boards.straightdope.com/u/TroubleAgain)\ **Post date:** [November 13, 2008, 1:08am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/29 "2008-11-13T01:08:18Z")
7.something. I think I could do better, because I kind of didn’t do the first round right. ---
**Author:** ![Headrush042](https://avatars.discourse-cdn.com/v4/letter/h/a5b964/32.png) [@Headrush042](https://boards.straightdope.com/u/Headrush042)\ **Post date:** [November 13, 2008, 1:12am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/30 "2008-11-13T01:12:02Z")
4.73, and happy to report 0.0 on one of the convergences. ---
**Author:** ![Satchmo](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/satchmo/32/4223_2.png) [@Satchmo](https://boards.straightdope.com/u/Satchmo)\ **Post date:** [November 13, 2008, 1:30am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/31 "2008-11-13T01:30:12Z")
Your inaccuracy by category: Parallelogram 7.2 2.2 11.4 Midpoint 2.8 8.9 7.6 Bisect angle 2.9 7.8 4.4 Triangle center 7.6 2.3 4.7 Circle center 3.2 1.0 3.6 Right angle 1.5 0.6 1.5 Convergence 5.1 9.5 8.5 Average error: 4.97 (lower is better) That was a challenge. I expect if I try again, I’ll get worse instead of better. ---
**Author:** ![Balance](https://avatars.discourse-cdn.com/v4/letter/b/ccd318/32.png) [@Balance](https://boards.straightdope.com/u/Balance)\ **Post date:** [November 13, 2008, 1:55am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/32 "2008-11-13T01:55:16Z")
Eh, not so bad. First try was 3.56, second was 3.27. I seem to be consistently best at finding the center of the circle and convergences. I suck at parallelograms, and I’m erratic on angles. (Actually, I’m shocked I did this well.) ---
**Author:** ![wonky](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/wonky/32/393_2.png) [@wonky](https://boards.straightdope.com/u/wonky)\ **Post date:** [November 13, 2008, 2:18am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/33 "2008-11-13T02:18:58Z")
Best scores on this computer: 3.31 jsgoddess 3.83 jsgoddess 4.10 jsgoddess I got one perfect on a bisect angle and one 0.2 on a right angle. Those dratted convergence scores, though. Yipes! ---
**Author:** ![Kythereia](https://avatars.discourse-cdn.com/v4/letter/k/e8c25b/32.png) [@Kythereia](https://boards.straightdope.com/u/Kythereia)\ **Post date:** [November 13, 2008, 3:18am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/34 "2008-11-13T03:18:00Z")
5.47! Woo! Although I was terrible on the convergence one–16.8 units, yikes. ---
**Author:** ![kittenblue](https://avatars.discourse-cdn.com/v4/letter/k/ba8739/32.png) [@kittenblue](https://boards.straightdope.com/u/kittenblue)\ **Post date:** [November 13, 2008, 3:30am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/35 "2008-11-13T03:30:34Z")
Gosh, I thought I was doing so good…and I do this for a living…and I make great right angles, apparently…but my score was a 10.83. I’ll have to try again when I’m not trying to dry fresh nail polish…yeah, that’s my excuse… ---
**Author:** ![Dinaroozie](https://avatars.discourse-cdn.com/v4/letter/d/e9c0ed/32.png) [@Dinaroozie](https://boards.straightdope.com/u/Dinaroozie)\ **Post date:** [November 13, 2008, 4:17am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/36 "2008-11-13T04:17:55Z")
Parallelogram 2.2 8.1 5.0 Midpoint 3.2 2.2 0.0 Bisect angle 1.7 1.9 0.5 Triangle center 3.2 2.8 3.9 Circle center 2.0 2.2 2.0 Right angle 0.6 1.6 0.3 Convergence 1.4 1.0 5.0 Copped 2.42 on average. Damn you **Shayna**! _shakes tiny fist_ Seriously though, you can get a lot of mileage from crossing your eyes (helps on a lot of them, to match up points of equal distance) to make pairs of points merge, and from counting the pixel stride on the lines to figure out angles. This may or may not make me a nerd. ---
**Author:** ![uncle\_squeegee](https://avatars.discourse-cdn.com/v4/letter/u/b5e925/32.png) [@uncle\_squeegee](https://boards.straightdope.com/u/uncle_squeegee)\ **Post date:** [November 13, 2008, 4:43am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/37 "2008-11-13T04:43:21Z")
I need glasses. Oh, wait, I’m already wearing them. Crap. ---
**Author:** ![wonky](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/wonky/32/393_2.png) [@wonky](https://boards.straightdope.com/u/wonky)\ **Post date:** [November 13, 2008, 4:58am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/38 "2008-11-13T04:58:52Z")
> [@Dinaroozie](#): > > This may or may not make me a nerd. It does. Trust me, it does. 😃 ---
**Author:** ![panache45](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/panache45/32/64_2.png) [@panache45](https://boards.straightdope.com/u/panache45)\ **Post date:** [November 13, 2008, 5:22am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/39 "2008-11-13T05:22:57Z")
2.79 🙂 ---
**Author:** ![Silophant](https://avatars.discourse-cdn.com/v4/letter/s/a698b9/32.png) [@Silophant](https://boards.straightdope.com/u/Silophant)\ **Post date:** [November 13, 2008, 5:26am UTC](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425/40 "2008-11-13T05:26:57Z")
4.33. I’ll try again in the morning, from a better monitor. And, y’know, after sleeping. [Previous page](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425.md?page=1) [Next page](https://boards.straightdope.com/t/this-rocks-eyeballing-game/472425.md?page=3)