this post was submitted on 09 Oct 2024
540 points (97.4% liked)
Lemmy Shitpost
26801 readers
2872 users here now
Welcome to Lemmy Shitpost. Here you can shitpost to your hearts content.
Anything and everything goes. Memes, Jokes, Vents and Banter. Though we still have to comply with lemmy.world instance rules. So behave!
Rules:
1. Be Respectful
Refrain from using harmful language pertaining to a protected characteristic: e.g. race, gender, sexuality, disability or religion.
Refrain from being argumentative when responding or commenting to posts/replies. Personal attacks are not welcome here.
...
2. No Illegal Content
Content that violates the law. Any post/comment found to be in breach of common law will be removed and given to the authorities if required.
That means:
-No promoting violence/threats against any individuals
-No CSA content or Revenge Porn
-No sharing private/personal information (Doxxing)
...
3. No Spam
Posting the same post, no matter the intent is against the rules.
-If you have posted content, please refrain from re-posting said content within this community.
-Do not spam posts with intent to harass, annoy, bully, advertise, scam or harm this community.
-No posting Scams/Advertisements/Phishing Links/IP Grabbers
-No Bots, Bots will be banned from the community.
...
4. No Porn/Explicit
Content
-Do not post explicit content. Lemmy.World is not the instance for NSFW content.
-Do not post Gore or Shock Content.
...
5. No Enciting Harassment,
Brigading, Doxxing or Witch Hunts
-Do not Brigade other Communities
-No calls to action against other communities/users within Lemmy or outside of Lemmy.
-No Witch Hunts against users/communities.
-No content that harasses members within or outside of the community.
...
6. NSFW should be behind NSFW tags.
-Content that is NSFW should be behind NSFW tags.
-Content that might be distressing should be kept behind NSFW tags.
...
If you see content that is a breach of the rules, please flag and report the comment and a moderator will take action where they can.
Also check out:
Partnered Communities:
1.Memes
10.LinuxMemes (Linux themed memes)
Reach out to
All communities included on the sidebar are to be made in compliance with the instance rules. Striker
founded 1 year ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
135Β° for anyone wondering.
correct, just commenting the 100/80 intersection looks like 90/90, i think it was intentionally misleading, classic trying to get you problem
Yes I originally thought 90 but then noticed the absence of a right angle sign. Also 60+40=100 which means the last angle should be 80. Making that perpendicular 100/80
What a bunch of bullshit. Just draw it way off 90 if you don't want people to use a protractor. I calculated 125Β° because of this (but I'm happy I still got the right wrong answer, if that makes sense)
In my geometry classes, it's only 90 degrees if it's marked by a right angle marker. Otherwise, no matter how "right" it looks, if you assume before proving, it's on you.
this is a meme tho. i wanted to treat it like a "real life" problem where if i saw those obviously 90 degree corners, i would just say it's 90 because nowhere else in all my life outside of stupid schoolwork trick questions would that happen. which meant i got to the answer in a few seconds, which is a handy skill in real life.
You could potentially run into this or something very similar in cad when your sketches aren't fully defined yet. I've definitely ran into models that are slightly off square because someone missed a constraint much earlier in the timeline.
Its not bullshit, its conventions that make a lot more whole sense later on.
I'd get out my red pen and write: "Bad diagram. -1pt See me after class."
Yes, simple doodle below for anyone wondering.
You start from left, and calculate them 1 by 1, based on the angles that you already know. It is quite simple actually, you just have to know they always add up to 180 (within triangle, and when you βsplitβ the space over a straight line).
you mean to say the right angles aren't right angles? disgusting, get this outta my sight
evil math teacher laughing in background
this diagram does not provide a right angle indicator, and thus should not be assumed as a right angle
yes that's the stupid excuse my math teacher would give
For context: it used to be 675Β° a few years back so the math checks out.
that's not how global warming works
Nope. The value is "undefined". You don't have enough info to arrive at 135 - you are assuming that the bottom angle (sum of the angles that touch) is 180 degrees. Since there isn't a datum saying the bottom "line" is straight, nor does it say the triangle on the right is an isosceles triangle, it is impossible to solve.
I don't see any indication that this is limited to the Euclidean plane either
Haha, I love this.
Also nothing indicates the numbers are Arabic numerals.
You can't prove it's not hexadecimal.
I think assuming 2 line segments which make up a larger straight line segment to be parallel is generally accepted practice, and that would trump the angles that are drawn inaccurately.
Of course, it'd be better to put a hash through them both to indicate they're parallel, especially given the deceptively drawn most-likely-not-a-right-angle.
I got 125.
180-(90-35)=x 180-55=x 125=x
You're assuming it is a right angle
Nothing states that it is
Oh shit you're right. The left triangles unmarked angle is 80, meaning the right triangles internal angles are 100, 35, and 45. This means X is 135
Even if it was a right angle, I think a second assumption is that the top left and bottom lines are equal length, which is also not stated.
I think there's just not enough information in this picture to calculate the angle, and it can only be determined by measuring. But the image also does not specify that it is drawn to scale.
It isn't 90 degrees because the image is misleading. 60+40+y=180. y=80