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The value of x (sh.itjust.works)

submitted 3 days ago by sjmarf@sh.itjust.works to c/whitepeopletwitter@sh.itjust.works

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[–] Maggoty@lemmy.world 7 points 3 days ago (1 children)

Stupid stuff like this is why kids hate math class. Unless the problem says calculate all unmarked angles, those visually 90 degree angles are 90 degrees. It works that way in any non engineering job that uses angles because it's common sense.

[–] TheOakTree@lemm.ee 15 points 3 days ago* (last edited 3 days ago) (3 children)

...what? I get that this drawing is very dysfunctional, but are you going to argue that a triangle within a plane can have a sum of angles of 190°?

[–] Maggoty@lemmy.world 15 points 3 days ago (1 children)

Nope I'm not saying that. I'm saying this is a gotcha question that demotivates learners.

[–] TheOakTree@lemm.ee 8 points 3 days ago

I see. I agree completely. The only place this belongs is as a thought experiment on making assumptions in geometry.

[–] NoMoreLurkingToo@startrek.website 2 points 3 days ago (1 children)

The sum of the angles of a triangle are always 180°

[–] TheOakTree@lemm.ee 4 points 3 days ago

Yes, I believe I implied this by suggesting that the sum of angles being 190° is absurd.

[–] starman2112@sh.itjust.works 0 points 3 days ago (1 children)

No, they're saying that unless you're already good at this stuff, it's easy to assume that a visually 90° angle is actually 90° even when it's not

[–] taladar@sh.itjust.works 1 points 2 days ago

Especially if you are bad at this stuff you know that drawing anything like that accurately is a real pain and nobody who can avoid it will ever do it to represent anything accurately. That is what labels are for.