CDP Hole-punch question!

[pinop]

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Hey guys, I'm having a little trouble figuring out the folding pattern from CDP, specifically from fold 3 --> 4 (or 4 --> 3). I've been using the line of symmetry method and its been working out very nicely almost all the time, except for a few weird ones.

During my run on CDP, I had stared at this for a while, marked it, and came back to it and ended up guessing. I tried using a real piece of paper to try to fold out but couldn't figure out that 3 --> 4 fold. 😕

I've heard there are some strange folding patterns on the real DAT and I'm going to guess that exposing yourself / doing more PAT tests is the best route of action Suggestions on doing either Barrons or Achiever (in addition to +1 CDP, the free DAT bootcamp, and the 2009 ADA DAT)? [btw test is on the Sept. 16th! ^_^]

 

[Member 6236]

That looks straight up impossible!! :0

 

[Soleus715]

Key:

X RED= Resulting Hole after unfolding (Line of symmetry)
X ORANGE= Hole From Previous step.
X GREEN= Holes used for LoS method that moved and ended up somewhere else. Therefore, are non-existent on the answer!!!!!!

- - - BLUE= Line of Symmetry


The key to realizing where the LoS is from Fold 3 to 4 is by looking at the edges of the paper in Fold 4. One of the edges has to be the LoS and it appears that the diagonal slant under the hole is our first LoS.

The Green X's are due to the fact that the holes at that position ended up moving. this is easy to see if you follow the Green X as you mirror over the LoS. Another thing to note is that after the Green X moved, there was no paper under it that could have gotten punched.


Hope this helped, sorry for my terrible illustrating skills. >_>

 

[Dent35]

notice on 3 the pointy end on the bottom right? all they did was flip the paper and take that pointy end to the top left at 4. i hope this helps

 

[Dent35]

Key:

X RED= Resulting Hole after unfolding (Line of symmetry)
X ORANGE= Hole From Previous step.
X GREEN= Holes used for LoS method that moved and ended up somewhere else. Therefore, are non-existent on the answer!!!!!!

- - - BLUE= Line of Symmetry


The key to realizing where the LoS is from Fold 3 to 4 is by looking at the edges of the paper in Fold 4. One of the edges has to be the LoS and it appears that the diagonal slant under the hole is our first LoS.

The Green X's are due to the fact that the holes at that position ended up moving. this is easy to see if you follow the Green X as you mirror over the LoS. Another thing to note is that after the Green X moved, there was no paper under it that could have gotten punched.


Hope this helped, sorry for my terrible illustrating skills. >_>

oops i just saw your post right after i posted mine lol

 

[Soleus715]

oops i just saw your post right after i posted mine lol

the more the better! 👍

 

[Dent35]

Yuppp! Teamwork! ��

 

[Toadesque]

It looks difficult but the LoS method actually works pretty well here. I see someone else already explained it so I won't bother but in general you don't want to think too hard about the folding. Most of the time you can intuitively see which way the paper "had" to fold in order to end up the way it did. Once you think the LoS is correct just go ahead and reflect.

 

[starnova]

you guys are really ausom for taking the time to help him 🙂

 

[pinop]

Oh I seeeee. Thanks! I think I was just getting tripped up by quickly trying to imagine how it fold and ended up getting more and more confused as I was folding/unfolding it in my mind. So, just find the LoS heh

@soleus75 & @dent35: Wow this makes it really clear! Sincere thanks for taking the time to help me out!! You guys are friggin awesome.

@toadesque: Yeah! I see it now, I think its better to just find the LoS and reflect. Thanks for the input! ^_^

 

[Dent35]

Oh I seeeee. Thanks! I think I was just getting tripped up by quickly trying to imagine how it fold and ended up getting more and more confused as I was folding/unfolding it in my mind. So, just find the LoS heh

@soleus75 & @dent35: Wow this makes it really clear! Sincere thanks for taking the time to help me out!! You guys are friggin awesome.

@toadesque: Yeah! I see it now, I think its better to just find the LoS and reflect. Thanks for the input! ^_^

You're welcome 🙂