Sjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 18 hours agoThe value of xsh.itjust.worksimagemessage-square79fedilinkarrow-up1880
arrow-up1880imageThe value of xsh.itjust.worksSjmarf@sh.itjust.works to People Twitter@sh.itjust.works · 18 hours agomessage-square79fedilink
minus-squareMaggoty@lemmy.worldlinkfedilinkarrow-up13·13 hours agoStupid 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.
minus-squareTheOakTree@lemm.eelinkfedilinkarrow-up18·edit-212 hours ago…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°?
minus-squareMaggoty@lemmy.worldlinkfedilinkarrow-up16·12 hours agoNope I’m not saying that. I’m saying this is a gotcha question that demotivates learners.
minus-squareTheOakTree@lemm.eelinkfedilinkarrow-up8·12 hours agoI see. I agree completely. The only place this belongs is as a thought experiment on making assumptions in geometry.
minus-squareNoMoreLurkingToo@startrek.websitelinkfedilinkarrow-up2·12 hours agoThe sum of the angles of a triangle are always 180°
minus-squareTheOakTree@lemm.eelinkfedilinkarrow-up5·12 hours agoYes, I believe I implied this by suggesting that the sum of angles being 190° is absurd.
minus-squarestarman2112@sh.itjust.workslinkfedilinkarrow-up2·12 hours agoNo, 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
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.
…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°?
Nope I’m not saying that. I’m saying this is a gotcha question that demotivates learners.
I see. I agree completely. The only place this belongs is as a thought experiment on making assumptions in geometry.
The sum of the angles of a triangle are always 180°
Yes, I believe I implied this by suggesting that the sum of angles being 190° is absurd.
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