Respuesta :

aosera
Use Pythagoras' Theorem

[tex] {18}^{2} = {x}^{2} + {x}^{2} \\ 324 = {2x}^{2} \\ \frac{324}{2} = {x}^{2} \\ 162 = {x}^{2} \\ \sqrt{162} = x \\ x = 12.72792206[/tex]
Correct the answer to how many significant figures the question wants

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