Respuesta :

Answer:

12 inches

Step-by-step explanation:

1. The diagonal is the hypotenuse of the right triangle.  so since we know one side length, we can figure out the other side length

1. 16^2 + x^2= 20^2

2. 256 + x^2=400

3. x^2=144

4. [tex]\sqrt{144}[/tex] = 12

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good job