Explicación paso a paso:
[tex]h = 2y \: \: x = ... \\ {h}^{2} = {x}^{2} + {y}^{2} \\ ( {2y)}^{2} = {x}^{2} + {y}^{2} \\ 4 {y}^{2} = {x}^{2} + {y}^{2} \\ 4 {y }^{2} - {y}^{2} = {x}^{2} \\ 3 {y}^{2} = {x}^{2} \\ \sqrt{3 {y}^{2} } = \sqrt{ {x}^{2} } \\ y \sqrt{3} = x[/tex]