Math puzzler: can you make a rectangle with one cut?


#1

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#2

wait, what’s wrong with just cutting it horizontally through the middle?


#3

That’s what I came up with too.


#4

Haven’t watched the video, but don’t these work? (shoddy MS Paint work notwithstanding)

and


#5

I cut off the whole left side, rotated it 90 degrees, and sat it on top. Also a rectangle. (edit: @daneel had not posted when I wrote it!!)

Tangrams are where it is at


#6

It’s interesting that there are at least three solutions. I chose a different one from the author of the video. Yet this fact was not addressed.


#7

I agree. This “puzzle” looks incredibly simple.


#8

I get the impression that there’s an unstated assumption in the original problem. While it challenges you to “cut the shape into two pieces, using all the area, that can form a rectangle”, what they actually appear to mean is “cut the shape into two pieces, using all the area, that can form a rectangle [without rotating the resultant pieces]

(Though daneel’s second solution still appears to work even then.)


#9

I am beginning to think we are not the target audience…


#10

Very annoying. Whether these “solutions” work or not depends on the relative edge sizes… and the author doesn’t supply those sizes.


#11

This puzzle needed a Facebook-like “93% can’t do it!” sub-headline.


#12

I do not see any math.


#13

Okay, I’m going to be the jerk and just say it: that was stupidly easy.


#14

yeah, I came up with a different solution, and I don’t think I would have come up with their solution because of the BB headline including “one cut” which I took to mean one straight cut…


#15

That was my feeling. I saw both of @daneel’s solutions, but I was pretty sure that whatever answer I came up with it would be disallowed because I wasn’t doing the kind of “lateral thinking” that the puzzle-maker wanted me to.


#16

Stupid-easy is right. I was so sure that the first solution I thought of (which everyone else also got) was way too obvious to be the right one, so I spent a lot of time overthinking it.
Then it just turns out to be something that he probably copied from the back of Highlights Magazine.


#17

I, too, thought it was easy-peasy. But, racked with self doubt, I rushed to the Polygon Outlet and bought a fresh new rectangle, just to be safe.


#18

Is it still buy 12 polygons and get the 13th for just one quatloo?


#19

For newcomers, yes.


#20

Jerk…