How smart are you, /b/?

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idfk

Need at least one more angle associated with the bottom triangle.

>>737015222
No you don't.

This is really easy trig.

>>737015400
Prove it.

>>737014876
i just had a math graduation exam today, let me try to solve this shit. give me a moment

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>>737016167
Bollocks

>>737017032
Prove it.

>>737017032
You forgot your argument pal

X = 30 degrees

>>737017641
Prove it.

ITT: OP is a faggot who can't even remember his basic trig come summer.

>>737014876

I'm on it

X is a number between 1-150, and it is impossible to say what the actual angle equals because not enough information is given in the picture.

>>737018371
Wrong, dumbass

>>737018521
Prove it.

>>737014876
x is 20

>>737014876
We go to this site to be lazy.

>>737018371
This is incorrect, see the annotation I posted above. x + th = 130 deg, but both x and th are unknown, so the question is open.

>>737018597
You can actually calculate it because the altern intern angles of the cross in the middle are equal, and the sum of all angles in a triangle is 180 degrees, but i'm too lazy to do the math

X = 30

>>737019058
No wait are they called opposite angles? Some like that

>>737014876
> its in the bottom-right

>>737019058
We know all three angles of three triangles ( >>737016167 ), but since we don't have two angles in the triangle with x, we CANNOT find theta OR x.

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>>737014876
>people who do maths in their free time
fuckign nerds

x is 20 retards cant believe yall skipped middleschool

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i dunno

>>737019448
what are you doing here? didn't they give you any homework for summer? bet it includes so basic trig, so you better get on it, kid.

>>737019448
Prove it.

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>>737019482
Thanks for contributing absoluetly nothing new, you ultranigger, did you even read the thread before you posted?

>>737019263
Mh

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Yeah let's see

>>737017744
I mean to say, X is 30 degrees or less. 15 degrees is probably what it really is.
My english is shit so bare with me.
Use anons pic to follow.
>>737016167
This anon basically had it down. The missing angle beside X (not the 30 degrees) is an obtuse angle. So we have to assume it is over 90 degrees. To the far left of the shape, we have 20 degrees. The next corner to that (the bottom left) is 30 + X degrees. Finally, we have the obtuse angle, to complete the triangle I am describing.
So we have 20 + (30 + X) + Obtuse angle = 180
180 - 20 = 160
(30 + X) + Obtuse angle = 160
We know that the angle beside our obtuse angle is 40 degrees. X + (40 + obtuse angle) + 10 Degrees (Top right of diagram) = 180
Just by looking at the equation, you can already tell that X is going to be a small value. Slightly larger than the 10 degrees to the top right.
So, I'll assume X is 15 degrees. Making our obtuse angle, have a value of 115 degrees.
15 + 50 + 115 = 180
20 + (30 + 15) + 115 = 180
10 + 15 + (115 + 40) = 180

Although 15 may no be the right answer to X, X HAS to be between 30 and 10.00000000001, but comparing the size of angle X to 20 degrees, we can reduce our range to 19 and 10.000001.
I say 15 degrees, but I would not rule out the possibility of X being 30 too.

>>737014876
30*

>>737019761
picture is slightly off just sayin

>>737016167

since we can assume theta and x to be integers, we can just try all 360 possible values for x and theta.

>>737019897
No anon has his angles right. Where exactly do you see it is off?

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>>737019761
>assuming the diagram is to scale
Why didn't you just tell us ahead of time that your post was bait?

>>737019908
>this post
Instead of pulling restrictions out of your ass and pretending they're meaningful, why don't you restrict yourself to a padded cell and pretend you're not a burden on society?

>>737019987
Not that anon but its wrong to deduce it's 15 degrees. You can assume that and say i get at most an error of 5% which might aswell be not nehligible. Anyway if you are going for this approach might aswell scan the thing and get the exact angles of the image trough a computer program

>>737018788

>>737020055
Of course it's bait. All of the labels are halfway between angles so you have to guess which one is meant. This being /b/, people will just assume which one is meant. Is the x referring to the angle to the left or right of it? Who knows?

x is 20, i cheated

no for real though its gotta have a unique value, none of that "Hurr durr its between 1 and 69" shit

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>>737018788
its 20

>>737020376
kek

>>737014876
20°?

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>>737020376
I dearly hope your condition rendered you sterile
If not you should amend that as soon as you can

>>737019761
Why have you assumed 5 has anything to do with anything.? I assume its to scale and that its 20 just because. Every single angle is in the 10s so now why go half? Are you retarded? Start from scratch. And see where you went wrong

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It's 20.000000000000064.
I calculated.

>>737019416
What are you doing here then? Also I agree
Haha nerds

this got posted a few weeks ago

it's called Langley's Adventitious Angles

the exact numbers in the original problem aren't the same, but the proof techniques will still hold

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it's 50

>>737021028
this

>>737021060

dat rounding error

>>737021028
Good work homie

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>>737021028
Lol you genius. Have a banana. Also can you explain

>>737020446
this nigga got it first...

>>737019633
Not the guy who said 20 but it works.

>>737019669
chill you shit, you underage sperg. not everyone has the patience to wade through knee-deep autism just so some dickhead's feefees don't get hurt.

>>737021210
Are you sure?

https://en.wikipedia.org/wiki/GeoGebra

now begone, math threads

>>737019633
>>737021028
The total internal angle of the four sided polygon should be 360, but yours is 210

>>737021860
elaborate, which one do you mean?

>>737014876
14º

>>737021028
Gonna need some comment on where youre getting 130 (added triangle), 30 (added triangle), and 110 from.

>>737021860
60+20+70+10+30+20+110+(180-130-10)=360

>>737021991
https://www.mathsisfun.com/geometry/interior-angles-polygons.html

The whole four sided polygon which all the triangles reside

>>737015222
No you don't retard. This is easy as fuck.

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>>737014876
How can the same angle have two different values? I'll tell you how.

>>737022082
i know what an internal angle is but i cant find which one you mean they all add up?

>>737022272
180-60-70-10=40
180-130-10=40

u fokken wot

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>>737022272
Because your retarded
>>737021028
Yeah anon explain please
>>737021552
>>737022066
I'm just as lost right now

>>737022408
There is only one four sided polygon in the figure. If you can't identify it, youre beyond help.

>>737022408
>>737021028
I have another question. How did you calcule calcuclate this 110 and 30 degrees on the right? I found that they are 140 together, but how did you calculate each?

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>>737022272

>>737014876

It's 30. Angles of the triangle x is in are 30, 50, 100

I'm getting 30..

>>737022673

see
>>737021144

>>737022856

Also, where the 2 lines intersect in the middle, the 2 acute angles are both 50 and the 2 obtuse ones are 130

>>737022573
cant believe i actually fell for the bait

>>737022940
Your getting stupid...
>>737022573
I count atleast 2 you tool. And they're all equal. So your working on the figure.

>>737023132
Mwah.

>>737017226
Moo

>>737023325

You're a moron. It's 30

>>737021144
>Langley's Adventitious Angles
thx

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>>737014876
I found it … give me a harder one next time

>>737023582
L A T E
A
T
E

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>>737022673

I started by extending the triangle, designating the unknown angles using the variables shown here, and solved some simultaneous equations. You just have to work out how to express some angles in terms of the others.

>>737023422
Fuck you its 15

>>737023786
You have three equations and four unknowns there. Any fourth equation you can add isnt distinct from the first three (rref has a row of zeros), meaning an infinite number of solutions (x+y=130). The values you have selected are consistent, but they are not the only solution.

its geometry niggers start using geometry ffs

>>737023786
Do this thingy>>737022082
Your polygons got
80+80+60+140 = 360
Therefore your thingy is wrong.

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Confirmed, it's 20°.

Good work to the anons that figure it out the honest way.

>>737024238

I'm not claiming it's a proof. Honestly, as soon as I noted that x'-y=20, I took a wild guess at the value of x, plugged in the angles, and saw that they fit. So it's as much empirical as analytical. I'd like to do something more rigorous with it, but I gotta go to work. See ya /b/.

>>737024340
bruh people are just gonna ignore you

atleast fucking draw a picture of which ones you mean

see
>>737023132

>>737024542
That's what I assumed.

>>737024238
I'm wracking my brain trying to figure out how to redraw this thing to demonstrate multiple solutions, but it must have something to do with violating the spatial layout, crossing vertices or something. In all likelihood 20 degrees is the only solution consistent with the actual problem, but the system of equations involved can't really be constrained like that without resorting to much higher level math.

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>>737024602
I'm on my phone shit posting. Is it 30 or 20 cause this is all so confusing now

>>737024340

The interior angles of the overall quadrilateral are actually 80+80+150+50=360, and a quadrilateral has an interior angle sum of 360, so my result is consistent.