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### How good are your geometric intuition?

Have you ever hung a photo frame on a wall? Can you hang it straight or is it always askew no matter how hard you try? Can you point the center of your plate? Can you draw right angles without using a protractor? When I was in college, me and my friends used to test our abilities to gauge the length of straight lines and angles without using any equipment. This helped us to liven up the otherwise boring engineering drawing classes. If you haven’t had the opportunity to play such games, then here is one to test yourself with.

The eyeballing game works by showing you a series of geometries that need to be adjusted a little bit to make them right. A square highlights the point that needs to be moved or adjusted. Use the mouse to drag the blue square or arrowhead where you feel it is 'right'. Once you let go of the mouse, the computer evaluates your move, so don't let up on the mouse button until you are sure. The 'correct' geometry is also shown in green, so you can see where you went wrong.

The test consist of 7 challenges and each challenge is presented three times. The scoring is simple: the computer measures the error you made in pixels for lines and in degrees times two for problems involving angles. Your score is the average error you made during the entire test. The lower your average error, the better. At the end of the test you are shown how you fared compared to other players.

I managed to get a score of 3.85 and the results tell me it’s pretty good!

For me, the parallelogram test was the hardest. As you can see from my score card, I was way off in the parallelogram test while making right angles was the easiest.

So what’s your score?

### 69 alternatives to the default Facebook profile picture

If you have changed the default Facebook profile picture and uploaded your own, it’s fine. But if not, then why not replace that boring picture of the guy with a wisp of hair sticking out of his head with something different and funny?

### How to Record CPU and Memory Usage Over Time in Windows?

Whenever the computer is lagging or some application is taking too long to respond, we usually fire up task manager and look under the Performance tab or under Processes to check on processor utilization or the amount of free memory available. The task manager is ideal for real-time analysis of CPU and memory utilization. It even displays a short history of CPU utilization in the form of a graph. You get a small time-window, about 30 seconds or so, depending on how large the viewing area is.

### How to Schedule Changes to Your Facebook Page Cover Photo

Facebook’s current layout, the so called Timeline, features a prominent, large cover photo that some people are using in a lot of different creative ways. Timeline is also available for Facebook Pages that people can use to promote their website or business or event. Although you can change the cover photo as often as you like, it’s meant to be static – something which you design and leave it for at least a few weeks or months like a redesigned website. However, there are times when you may want to change the cover photo frequently and periodically to match event dates or some special promotion that you are running or plan to run. So, here is how you can do that.