SOLUTION: how do you use the pythagorean theorem to find the lengths of the sides of a triangle with 2x-4 2x and 20

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Question 889020: how do you use the pythagorean theorem to find the lengths of the sides of a triangle with 2x-4 2x and 20

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
x must be some positive number, and so must 2x-4. Focus first on 2x-4%3E0. The requirement for x is x%3C2 AND x%3E0. Very clearly, the hypotenuse for this triangle must be 20 unit length.

%282x%29%5E2%2B%282x-4%29%5E2=20%5E2, use of Pythagorean Theorem.
Solve for x.