The triangle is located on a graph with the right bottom corner at (0,0). Each side is 3m. I need the centre mass in (x,y) coordinates. I know x is -1.5 because you just divide by 2, but I don't know how to get the y value.
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well in this case just divide the height of the triangle by 3
h : height of the triangle
h^2= 3^2-1.5^2=6.75 => h=2.598~2.6
answer is h/3 = .867
h : height of the triangle
h^2= 3^2-1.5^2=6.75 => h=2.598~2.6
answer is h/3 = .867