"How many triangles"

Discussion in 'Attention Seekers' started by Karlijn, Apr 5, 2018.

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1. KarlijnGuest

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I've seen this thing multiple times in facebook, and I'm surprised by how many people get it totally wrong.
What do you think? How many triangles are there?

2. MithrasChi Moderator

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25. 26 if u count the word triangles

3. KarlijnGuest

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Can you point them out? All 25? (the word "triangle" is not a triangle)

4. Squire72Moberator

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I only see 18

One big triangle, 3 little ones at the top of the big one, 3 that go from the top to 2/3 down, and 3 long skinny ones that go from the top to the bottom, then 2 wider triangles that overlap and go 1/3 down, 2 that go 2/3 down from the top, and 2 more that go all the way to the bottom. And one that goes from the top 1/3 down, and 2/3 down that’s full width

5. MithrasChi Moderator

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yeah one could argue that the word triangle counts as well but yeah no i cant point em out unless in person. actually i change my answer to 24

6. KarlijnGuest

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That's what I counted too

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7. mcpon14Guest

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Sakarinbo knows how to draw those really, really well.

8. Woofersoul jer

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do square count

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11. yarmulkeNewbie

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18
I only see 14 I'm missing 4

12. mcpon14Guest

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@The Reverend Didn't Archimedes figure out an approximation of pi or the circumference of the circle or something but using ever-smaller triangles?

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Yes (using circumscribed regular polygons), but as far as numerical methods go for approximating pi, it converges rather slowly. However, Archimedes was definitely a profound genius.

14. MithrasChi Moderator

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oh well this helps. the top 1/3 of the figure is a triangle, the middle 3rd is a triangle and the
more like missing 10

15. mcpon14Guest

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But can't one triangle be counted as 3 triangles if you use each of the points as the top point? Or is there no top point, lol?

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What?

17. mcpon14Guest

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Probably a no on a top point.

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Do you mean can we rotate a figure in the plane and call it a different figure?

19. mcpon14Guest

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Yeah, if the concept of a top point is used, but I'm only talking about in this instance.

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