wu :: forums
        (http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi)
      

        riddles >> easy >> Triangles
        
(Message started by: alien2 on Oct 22nd, 2012, 1:33pm)
Title: Triangles
Post by alien2 on Oct 22nd, 2012, 1:33pm
By drawing two squares and two lines, how many triangles can you make?
Title: Re: Triangles
Post by benmartorano on Oct 22nd, 2012, 4:13pm
6???
Title: Re: Triangles
Post by peoplepower on Oct 22nd, 2012, 4:52pm
I get [hide]12[/hide] by [hide]ineterleaving the squares and drawing the lines such that each one cuts two already constructed triangles in half.[/hide]
Title: Re: Triangles
Post by gotit on Oct 23rd, 2012, 6:31am
I get [hide]15[/hide]
Title: Re: Triangles
Post by towr on Oct 23rd, 2012, 8:42am
I can get at least 1 more than gotit.
Title: Re: Triangles
Post by Noke Lieu on Oct 24th, 2012, 4:53am
...and I assume towr also has 5 *obvious* pentagons in the middle? I just counted, but hesitant to post my score.
Title: Re: Triangles
Post by towr on Oct 24th, 2012, 8:50am
I only see 4 obvious pentagons.. So maybe it's a different formation; 5's a bit odd anyway.
Title: Re: Triangles
Post by Grimbal on Oct 24th, 2012, 9:57am
[hide]18[/hide]  The tricky part is actually to count the triangles.
Title: Re: Triangles
Post by towr on Oct 24th, 2012, 10:15am
You're right, I actually had [hide]20[/hide]
Title: Re: Triangles
Post by Noke Lieu on Oct 24th, 2012, 2:45pm
Um... Yes. Counting IS hard. I had 4 pentagons :-[  and 24 triangles. I didn't find counting the triangles hard...
[hide] 4*3 (the bisected corners), 4 (the unbisected corners), 4 (the quarter squares), 4 (the half squares) [/hide].
Title: Re: Triangles
Post by Grimbal on Oct 25th, 2012, 12:48am
OK, I recounted, I get [hide]24[/hide] too.
Title: Re: Triangles
Post by towr on Oct 25th, 2012, 8:48am
Yeah, me too.
I can't believe how hard counting triangles is... :-[
Title: Re: Triangles
Post by benmartorano on Oct 25th, 2012, 3:45pm
I should not have tried doing this in my head.... :-[
Title: Re: Triangles
Post by Noke Lieu on Oct 25th, 2012, 5:19pm
I too was comfortable with 20 (hence  'post my score'). It was only after I posted that I noticed the 4 largest triangles...
Title: Re: Triangles
Post by Grimbal on Oct 26th, 2012, 7:45am
Who put this in easy anyway?  :P

I have a trick to count triangles:
I take any outer corner of the figure, count how many triange there are touching that corner.
Then I erase it (i.e. put a finger on it) and restart with another corner until no more triangle is possible.

That makes it easy.

But I still miscounted. :-/
Title: Re: Triangles
Post by pfeinstein on Nov 7th, 2012, 6:55am
I get [hideb]14[/hideb], and who put this in easy anyway?
Title: Re: Triangles
Post by Ricky30 on Dec 2nd, 2012, 4:02am
There may have many triangles. It depends on how you arrange the square and draw the line.
Title: Re: Triangles
Post by marlonmark on Jan 2nd, 2013, 2:28am
hats off got it nice one..
Title: Re: Triangles
Post by atyq on Feb 2nd, 2013, 2:02am
I can't find the way to get more than 11 triangles :(.
Title: Re: Triangles
Post by towr on Feb 2nd, 2013, 1:25pm
See attachment,
8 red,
8 green, (4 of which consist of two reds)
4 blue,
4 orange (consisting of two blues, which are shared)
Title: Re: Triangles
Post by Apala on Mar 13th, 2013, 12:54am
[hide]22[/hide] but it depends on your placement.
Title: Re: Triangles
Post by Mariko79 on Apr 1st, 2013, 4:01am
Very sticky question...I think it's 20  :)
Title: Re: Triangles
Post by SEMfuze on Sep 27th, 2013, 7:39am

on 02/02/13 at 13:25:06, towr wrote:
See attachment,
8 red,
8 green, (4 of which consist of two reds)
4 blue,
4 orange (consisting of two blues, which are shared)



I see 6 orange.
Title: Re: Triangles
Post by towr on Sep 27th, 2013, 7:48am

on 09/27/13 at 07:39:42, SEMfuze wrote:
I see 6 orange.
Then you're probably misinterpreting the figure. Each orange-type triangle consists of 3 vertices of the main square; as it only has 4 vertices, there can only be 4 such triangles.
Title: Re: Triangles
Post by Nursejim on Sep 27th, 2013, 7:51pm
Yeah there are more than 4 triangles in the orange figure but that not what it means. There are 4 of the orange "size" triangles in the whole figure. Alot of these types of puzzles  were on the asvab when I tested years back. Fun stuff.
Title: Re: Triangles
Post by webtasarim on Oct 6th, 2013, 10:37am
i found 24 .what is the true ans ?
Title: Re: Triangles
Post by UgoLocal02 on Jun 12th, 2014, 2:31am
i got 15
Title: Re: Triangles
Post by Annettagiles on Sep 26th, 2014, 3:18am
could you please post a snap shot as you are telling about two squares and two lines I don't know where you are telling to draw the two lines so, please post a snapshot which will be very helpful for me.
Title: Re: Triangles
Post by towr on Sep 26th, 2014, 4:02am

on 09/26/14 at 03:18:46, Annettagiles wrote:
could you please post a snap shot as you are telling about two squares and two lines I don't know where you are telling to draw the two lines so, please post a snapshot which will be very helpful for me.
That's the whole point. You have to decide where to draw the squares and lines yourself so you can maximize the number of triangles.


Powered by YaBB 1 Gold - SP 1.4!
Forum software copyright © 2000-2004 Yet another Bulletin Board