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Question 1062519: Image and video hosting by TinyPic
Found 2 solutions by josgarithmetic, math_helper:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Pythagorean Theorem formula. You want to solve for a.

a%5E2%2Bb%5E2=c%5E2

a%5E2=c%5E2-b%5E2

a=sqrt%28c%5E2-b%5E2%29

a=sqrt%2815%5E2-9%5E2%29

Answer by math_helper(2461) About Me  (Show Source):