Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Object with circle, square, and triangle cross sections?

  1. Mar 21, 2004 #1
    does anyone know an object, when viewed from 3 differents views, looks like a circle, a square, and a triangle?
  2. jcsd
  3. Mar 21, 2004 #2
    You could make one.

    Take a cylinder and make a cut at an angle. Make a few more cuts at opportune places. Continue until you get what you want.

  4. Mar 21, 2004 #3


    User Avatar
    Staff Emeritus
    Gold Member
    Dearly Missed

    It's a paper cup with a circular rim and a straight line bottom. It's circular if viewed from above, a triangle if viewed from, say, the north or south side and square if viewed from the east or west side. Sometimes used to illustrate the Christian notion of the trinity.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook