Hello I was wondeing if anybody could help me work this out. I am an Structural Engineering student btw so feel free to have a laugh at my mathematical incompetence. I have an exam tomorrow where I will most likely have to find the plastic modulus of a triangle or trapezuim, this is the axis that cuts a shape into two equal areas. If you had a triangle what height below the apex would you draw this line to cut the shape in two? I have tried using similar triangles and some algebra, but I am just going round in circles (or triangles ) Thanks