I am 99.5% sure I've got it right, but I keep second-guessing myself.(adsbygoogle = window.adsbygoogle || []).push({});

1] Cube with sides of length X.

2] Diagonals out from each corner of length no less than X...

3] ...to an outer cube of sides of length Y.

What must be the (shortest) length of Y in terms of X?

I get [tex] y = 2\sqrt{2}x[/tex]

**Physics Forums - The Fusion of Science and Community**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# 3D geometry

Loading...

Similar Threads - geometry | Date |
---|---|

B What is the name of this triangular geometric shape? | Feb 20, 2018 |

I What Lobachevski meant by parallel lines | Feb 7, 2018 |

B Understanding A Middle Ordinate In Terms Of Geometry | Dec 31, 2017 |

I Demo of cosine direction with curvilinear coordinates | Dec 6, 2017 |

A Let's remove one axiom from Euclidean geometry | Nov 22, 2017 |

**Physics Forums - The Fusion of Science and Community**