a right angle triangle consists of three thin rods with lengths 3 dm, 4 dm and 5 dm. the masses are 0.9 kg, 1.2 kg and 1

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a right angle triangle consists of three thin rods with lengths
3 dm, 4 dm and 5 dm. the masses are 0.9 kg, 1.2 kg and 1.5 kg,
respectively. the longest catheter lies along the x-axis and the
shortest along the y-axis.
a) make a figure and determine the coordinates of the center of
gravity of the triangle.
b) calculate the moment of inertia of the triangle about the
z-axis.