August 2nd, 2016, 06:11 PM  #1 
Newbie Joined: Aug 2016 From: Florida Posts: 1 Thanks: 0  Geometry help please
A plane cuts sphere O in a circle âŠ™P that has diameter 2âˆš34. If the diameter of sphere O is 20, how far is the plane from O?

August 2nd, 2016, 06:53 PM  #2 
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,958 Thanks: 1146 Math Focus: Elementary mathematics and beyond 
Hi Tae and welcome to the forum. You've got an isosceles triangle with equal sides 10 and "base" 2âˆš34. Find the height and you've found your required distance. 

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arcs, circle, geometry, sphere 
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