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April 11th, 2018, 06:18 AM  #1 
Member Joined: Apr 2018 From: On Earth Posts: 34 Thanks: 0  3D Shapes with algebra
I have tried doing this many times but I cannot find the distance from X to A. Please help!

April 11th, 2018, 06:44 AM  #2 
Senior Member Joined: May 2016 From: USA Posts: 1,310 Thanks: 552 
What are you studying? You have asked three questions that seem quite unrelated. In any case, your diagram is too small for me to read.

April 11th, 2018, 06:49 AM  #3 
Member Joined: Apr 2018 From: On Earth Posts: 34 Thanks: 0 
Bigger diagram

April 11th, 2018, 07:38 AM  #4 
Global Moderator Joined: Dec 2006 Posts: 21,128 Thanks: 2337 
The required area = the area of the "base" of the discarded cone = $\pi h^2\!$.

April 12th, 2018, 04:38 AM  #5 
Member Joined: Apr 2018 From: On Earth Posts: 34 Thanks: 0  
April 12th, 2018, 08:07 AM  #6 
Global Moderator Joined: Dec 2006 Posts: 21,128 Thanks: 2337 
The discarded cone is geometrically similar to the original cone so its height and base radius are equal. Its height is given as h, so its base radius is h.


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