SOLUTION: A plane cuts sphere O in a circle ⊙P that has diameter 2√34. If the diameter of sphere O is 20, how far is the plane from O?

Algebra ->  Circles -> SOLUTION: A plane cuts sphere O in a circle ⊙P that has diameter 2√34. If the diameter of sphere O is 20, how far is the plane from O?      Log On


   



Question 1133613: A plane cuts sphere O in a circle ⊙P that has diameter 2√34. If the diameter of sphere O is 20, how far is the plane from O?
Answer by Edwin McCravy(20064) About Me  (Show Source):
You can put this solution on YOUR website!


The diameter of sphere O is 20.
Therefore the radius of the sphere, which is OQ, is 10.

The diameter of circle ⊙P is 2sqrt%2834%29.
Therefore the radius of circle ⊙P, which is PQ, is sqrt%2834%29.

The distance of the plane from O is OP.  By the
Pythagorean theorem,

OP%5E2%2BPQ%5E2=OQ%5E2

OP%5E2%2B%28sqrt%2834%29%29%5E2=%2810%29%5E2

OP%5E2%2B34=100

OP%5E2=66

OP=sqrt%2866%29

Edwin