Respuesta :

[tex]4x+6x+10x=180[/tex]

[tex]20x=180[/tex]

[tex]x=9[/tex]

So, the angles are:

[tex]4(9)=36[/tex]
[tex]6(9)=54[/tex]
[tex]10(9)=90[/tex]

It's a right triangle.