al4s

@al4s@lemmy.world

• ⁨Comment⁩ on ⁨How do we know that the ratio between the circumference and the diameter of a circle is preserved across radius sizes?⁩ ⁨⁨1⁩ ⁨day⁩ ago⁩:

  You can approximate the length of any path (including circles) by adding the lengths of many small line segments that follow that path. Making a line segment bigger by some factor, will increase it’s length by the same factor. Therefore, scaling the circle by any factor, increases it’s circumference by the same factor. Scaling a circle is just scaling it’s radius so: Scaling the radius by some factor, changes the circumference by the same factor. That means the ratio between radius and circumference is always constant.

  I hope this is decipherable :D

• ⁨Comment⁩ on ⁨Are straws an unnecessary (but convenient) invention?⁩ ⁨⁨2⁩ ⁨years⁩ ago⁩:
  • You have a disability that causes movement problems like shaking, or your edibles were too strong
  • Limited neck/shoulder/arm mobility or a swollen lip (The latter makes it hard to get a proper seal)
  • You wear lipstick or other makeup that could get washed away