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## Homework Statement

Find the mass moment of inertia about the tip T (into the page). All dimensions are in mm, and the density is 7820 kg/m^3. The thickness of the triangle is 10mm

## Homework Equations

## The Attempt at a Solution

I tried to do a triple integration over dV (as density is constant) and made r^2=x^2+y^2, then multiplied my final answer by the density. I used limits of 0 to 0.01 for dz, 0 to 0.1 for dx and -0.4x to 0.4x for dy. I'm not really sure if this was the correct method, does anyone have any other ideas? Thanks in advance. [my answer was 1.647x10^(-3) kgm^2]