# 9-16-25... Pythagorean Theorem Day ? **URL:** \ **Category:** Miscellaneous and Personal Stuff I Must Share\ **Created:** [September 16, 2014, 4:16pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658 "2014-09-16T16:16:57Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![Hooleehootoo](https://avatars.discourse-cdn.com/v4/letter/h/eada6e/32.png) [@Hooleehootoo](https://boards.straightdope.com/u/Hooleehootoo)\ **Post date:** [September 16, 2014, 4:16pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/1 "2014-09-16T16:16:57Z")
Eleven years from today will we all be carrying around 3,4,5 right triangles ? ---
**Author:** ![etv78](https://avatars.discourse-cdn.com/v4/letter/e/d78d45/32.png) [@etv78](https://boards.straightdope.com/u/etv78)\ **Post date:** [September 16, 2014, 5:23pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/2 "2014-09-16T17:23:51Z")
Where was my 5-12-13 triangle last May? ---
**Author:** ![The\_Great\_Unwashed](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_great_unwashed/32/4791_2.png) [@The\_Great\_Unwashed](https://boards.straightdope.com/u/The_Great_Unwashed)\ **Post date:** [September 16, 2014, 5:28pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/3 "2014-09-16T17:28:14Z")
Uh? 9-16-25 is not a Pythagorean triple. There’s 12-9-15 a few days short of a year away, and then 9-12-15 8-18-17 12-16-20 7-24-25 10-24-26 I might have missed some but nowhere on that list is 9-16-25. ---
**Author:** ![Rysto](https://avatars.discourse-cdn.com/v4/letter/r/ecccb3/32.png) [@Rysto](https://boards.straightdope.com/u/Rysto)\ **Post date:** [September 16, 2014, 5:33pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/4 "2014-09-16T17:33:03Z")
> [@The\_Great\_Unwashed](#): > > I might have missed some but nowhere on that list is 9-16-25. The OP means 3-4-5. ---
**Author:** ![rjk](https://avatars.discourse-cdn.com/v4/letter/r/ed655f/32.png) [@rjk](https://boards.straightdope.com/u/rjk)\ **Post date:** [September 16, 2014, 5:35pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/5 "2014-09-16T17:35:34Z")
Remember the advice that guys should think about baseball during sex, so they can last longer? I don’t like baseball, so we were discussing other subjects to think about. **Zyada** suggested trigonometry, to which I replied (with appropriate motions) “three…Four… **FIVE!** ”. No more trig for me! 😃 ---
**Author:** ![The\_Great\_Unwashed](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/the_great_unwashed/32/4791_2.png) [@The\_Great\_Unwashed](https://boards.straightdope.com/u/The_Great_Unwashed)\ **Post date:** [September 16, 2014, 6:09pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/6 "2014-09-16T18:09:34Z")
> [@Rysto](#): > > The OP means 3-4-5. I got that, but why wait until 3²-4²-5² to celebrate? I see I missed a few, I’ll leave it as an exercise for the reader. ---
**Author:** ![CrazyCatLady](https://avatars.discourse-cdn.com/v4/letter/c/dfb087/32.png) [@CrazyCatLady](https://boards.straightdope.com/u/CrazyCatLady)\ **Post date:** [September 16, 2014, 6:09pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/7 "2014-09-16T18:09:42Z")
> [@Rysto](#): > > The OP means 3-4-5. Yeah, but 9-16-25 isn’t even remotely a 3:4:5 ratio. It’s a 3:5.3333:8.3333 ratio. ---
**Author:** ![Malacandra](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@Malacandra](https://boards.straightdope.com/u/Malacandra)\ **Post date:** [September 16, 2014, 6:58pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/8 "2014-09-16T18:58:41Z")
> [@CrazyCatLady](#): > > Yeah, but 9-16-25 isn’t even remotely a 3:4:5 ratio. It’s a 3:5.3333:8.3333 ratio. It’s the _squares_ on the sides of the 3-4-5 triangle. :dubious: ---
**Author:** ![CrazyCatLady](https://avatars.discourse-cdn.com/v4/letter/c/dfb087/32.png) [@CrazyCatLady](https://boards.straightdope.com/u/CrazyCatLady)\ **Post date:** [September 16, 2014, 8:51pm UTC](https://boards.straightdope.com/t/9-16-25-pythagorean-theorem-day/698658/9 "2014-09-16T20:51:03Z")
> [@Malacandra](#): > > It’s the _squares_ on the sides of the 3-4-5 triangle. :dubious: Yeah, that was a brain fart. Of course, I also understood the OP to be putting forth that a triangle with sides of 9, 16, and 25 fit the theorem…which is also incorrect.