SOLUTION: You are standing 18 feet from the circular wall of a silo and 36 feet from a point of tangency. What is the radius of the silo?

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Question 755517: You are standing 18 feet from the circular wall of a silo and 36 feet from a point of tangency. What is the radius of the silo?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Hint: if you draw out a pic, you'll have 2 right triangles with legs: r, 36, r+18 where r is the radius, so this means you need to solve the equation below for r

r%5E2+%2B+36%5E2+=+%28r%2B18%29%5E2