April 8th, 2018, 05:55 AM  #1 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,000 Thanks: 132 Math Focus: Trigonometry  [ASK] Parallelogram in Cuboid
In an ABCD.EFGH cuboid with AB = 4 cm, BC = 3 cm, and CG = 5 cm there is a parallelogram OBFPH with O is located at the center of ABCD and P is located at the center of EFGH. The distance between the lines HO and PB is .... A. $\displaystyle 5\sqrt3$ cm B. $\displaystyle 5\sqrt2$ cm C. $\displaystyle \sqrt5$ cm D. $\displaystyle \frac{5}{2}\sqrt2$ cm E. $\displaystyle \frac{5}{3}\sqrt3$ cm By making use of the parallelogram formula, I got $\displaystyle \frac{1}{5}\sqrt5$. Do you guys get the same answer as me or any of the options? 

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cuboid, parallelogram 
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