Question 841650
This page: <a href="http://pacificlearningacademy.com/2012/03/the-3d-pythagorean-theorem/">http://pacificlearningacademy.com/2012/03/the-3d-pythagorean-theorem/</a> explains how the 3D version of the pythagorean theorem is derived.


{{{d = sqrt(a^2 + b^2 + c^2)}}}


{{{d = sqrt(7^2 + 3^2 + 2.5^2)}}}


{{{d = sqrt(49 + 9 + 6.25)}}}


{{{d = sqrt(64.25)}}}


{{{d = 8.0156097709407}}} (this is approximate)


The length of the longest diagonal from one corner to another corner is roughly <font color="red">8.0156097709407 meters</font>