Maven (famous)@lemmy.zip to Science Memes@mander.xyzEnglish · 17 hours agoSquare!lemmy.zipimagemessage-square98fedilinkarrow-up1974cross-posted to: nonpolitical_memes@lemmy.ml
arrow-up1974imageSquare!lemmy.zipMaven (famous)@lemmy.zip to Science Memes@mander.xyzEnglish · 17 hours agomessage-square98fedilinkcross-posted to: nonpolitical_memes@lemmy.ml
minus-squarewholooksherelinkfedilinkEnglisharrow-up1·edit-23 hours agoOnly true in Cartesian coordinates. A straight line in polar coordinates with the same tangent would be a circle. EDIT: it is still a “straight” line. But then the result of a square on a surface is not the same shape any more.
minus-squareltxrtquq@lemmy.mllinkfedilinkEnglisharrow-up2·1 hour ago A straight line in polar coordinates with the same tangent would be a circle. I’m not sure that’s true. In non-euclidean geometry it might be, but aren’t polar coordinates just an alternative way of expressing cartesian? Looking at a libre textbook, it seems to be showing that a tangent line in polar coordinates is still a straight line, not a circle.
Only true in Cartesian coordinates.
A straight line in polar coordinates with the same tangent would be a circle.
EDIT: it is still a “straight” line. But then the result of a square on a surface is not the same shape any more.
I’m not sure that’s true. In non-euclidean geometry it might be, but aren’t polar coordinates just an alternative way of expressing cartesian?
Looking at a libre textbook, it seems to be showing that a tangent line in polar coordinates is still a straight line, not a circle.