Last minute TOP FRONT END HELP PLEASE

[buffdoctor]

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Ok guys I'm pretty good at getting top front end down to 2 answers. The thing is that between those answers the shapes are the same, but the lines are either dashed on one shape or solid in another. Can you guys please show me how you realize a line is going to be dashed or solid by looking at the other sides? Here's an example I'll upload. I just want to know how you can tell if a line is supposed to be dashed or not dashed. I drew arrows on the picture to show you guys.

Thanks for the help guys, much appreciated.

 

[chax1]

http://imageshack.us/photo/my-images/69/screenshot20120729at236.png/
I colored the lines to correspond to dashes and dots. Basically since the circle is hidden in the structure its dashed, and since when you rotate the front view to get the end view, you would be able to see the changes in depth of the side of the circle, the nooks or corners of the figure, whatever you want to call them so they'd be solid.

 

[buffdoctor]

no dude, i was just wondering in general how do you know if a line is going to be solid or dashed, like even where you drew the red, how do you know its not really dashed?

 

[michaelamae1]

was the correct answer C or D?

 

[buffdoctor]

the correct answer was D, I do understand why it is the right answer. My only question is how do you know if a line in between shapes is going to be solid or dashed? Sometimes the angles are weird and I'll think its solid when its really dashed or vice versa.

 

[Msmouth]

If you were to turn it sideways, the corners of the object are in line with what's hidden and show up solid and therefore cover up what would be dashed lines.

 

[Davermz450]

no dude, i was just wondering in general how do you know if a line is going to be solid or dashed, like even where you drew the red, how do you know its not really dashed?

You know when the object has a change in angle. The best way is to picture it in your head. For the problem you gave the first thing I saw was the top view everything is in line, you don't have anything sticking out of the object, so you know the circle is not a pole sticking out, it is a cylinder inside the object. Next, as explained above, the angle changes that over lap will only have one line represent them. As for the cylinder in the object noting is over lapping it. Now to know if it is dashed or solid we know it is a hole not a pole. So the only way to see the hole is in the front not from the side so the dash lines means it can not be seen but is inside of the object I hope this kinda makes sense lol good luck