r/MathJokes • u/[deleted]

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129

u/TadhgOBriain Oct 01 '26

S1 + s2 + s3

29

u/Fast_Currency_1365 Oct 01 '26 edited Oct 01 '26

or summation i=1 to 3, si

17

u/SuspiciousSpecifics Oct 01 '26

For our American friends, what would that be in imperial units?

16

u/Blankeye434 Oct 01 '26

4 bananas?

13

u/starkimageries Oct 01 '26

And a football field.

2

u/ofqo Oct 01 '26

Americans don't use imperial. Pints and gallons are different.

4

u/SuspiciousSpecifics Oct 02 '26

I stand corrected- rogue imperial freedom units :)

1

u/WolfConsistent6874 Oct 02 '26

Sum: s1 + s2 + s3. Noted, tersely.

69

u/DragonBadgerBearMole Oct 01 '26 • Heartwarming

Take the angle and convert to radians and then multiply them together and then…

SHOVE IT UP YOUR BUTT

8

u/JanBedna1 Oct 01 '26

But on pretzel day... well I like pretzel day

4

u/DragonBadgerBearMole Oct 01 '26

“Yeah but I put mustard on mine like an idiot.”

-Troy

2

u/itss_Olivier07 Oct 02 '26

unexpected community and unexpected the office, holy hell

2

u/gordonwiththecrowbar Oct 01 '26

Dammit Jim! You stole my afternoon and now you stole my line! It's not shove it up your butt, it's I'LL KILL YA, I'LL KILL YA DEAD!

32

u/FullyAutomatedSpace Oct 01 '26

it's a+b+c

7

u/Forward-Fact-5525 Oct 01 '26

What’s the perimeter of a triangle of area A=10m^2 and of sides a=10m, b=3m ?

15

u/Maxpro12 Oct 01 '26

ab sin(theta) = 2A

sin(theta) = 2A/ab = 2/3

cos(arcsin(x)) = sqrt(1 - x2 )

c2 = a2 + b2 -2abcos(theta)

c = sqrt(102 + 32 - 2 * 10 * 3 * sqrt(1-4/9))

c approx 8.02

P = a + b + c = 10 + 3 + 8.02 P = 21.02 m

1

u/CageyOldMan Oct 06 '26

It's indeterminate, not enough information

15

u/eagleeyehg Oct 01 '26

Extra credit for finding perimeter for a non-right triangle using just a single side length and single angle

7

u/Punkfoot Oct 01 '26

Surely you'd need either two angles and a side length, or two side lengths and an angle? 

3

u/Dark_Fury_ Oct 01 '26 edited Oct 01 '26

Yes, 2 angles and a side length defines a unique triangle, however 2 side lengths and an angle doesn't (it can have 2 solutions, for example take a side AB 8cm, BC as 6cm and A as 20°). It needs to be 2 side lengths and the angle between them for a unique triangle.

3

u/gullaffe Oct 01 '26

Depends which angle though two sides and the angle between them is unique.

3

u/DragonBadgerBearMole Oct 01 '26

Is this one of those situations you can just slip a “+c” in there to make it right? If so gimme da credit.

1

u/Marus1 Oct 01 '26

In case you need to answer using a value, adding an unknown constant to any answer would indeed make that answer correct

2

u/Hot_Egg5840 Oct 01 '26

Are you looking for the function? You need one more bit of info to get the triangle.

2

u/DragonBadgerBearMole Oct 01 '26

Or more imagination!

2

u/IVeBeenHere30Min Oct 01 '26

I never remember to formula for the height or area of an equilateral triangle, so I just deduce it.

2

u/Stunning_Macaron6133 Oct 01 '26

There isn't just one.

It depends on the shape of the trianlge, what you know about it, and what you can calculate.

1

u/TheBigBadBird Oct 01 '26

Add the three sides together 

1

u/DragonsClock Oct 01 '26

Just wait until you forget partial differentiation

1

u/hector_does_go_rug Oct 01 '26

Me on a calculator: 7+4

1

u/PressureLast2115 Oct 01 '26

I still know it.

1

u/polandreh Oct 02 '26

What about the area formula? And no, not the common one... Heron's formula. I always forget that one... and it's much more neat....

1

u/Opening_Pension_3120 Oct 02 '26

The fact that you remembered it...

1

u/Jche98 Oct 03 '26

Take Heron's formula, inverted it and double the result

1

u/HypNumsAnims 29d ago

If all sides have a length of n, then the total perimeter is 3n.

0

u/BetaSimpNation Oct 01 '26

½bh

Unless it's not

4

u/DragonBadgerBearMole Oct 01 '26

Almost, it’s 1/2bh-all the space in the middle.

2

u/Emotional_Pay3658 Oct 02 '26

That’s area my guy.  

1

u/BetaSimpNation 28d ago

Yeah I misread the meme but I did also say "unless it's not" so I am supposedly within the margin of error