Extracted text: : Consider the blue shaded triangle with a semicircular hole at the top. The figure is not to scale. y 123 тm 37 mm 74 mm a) Determine the moment of inertia around the a-axis of the triangle without the hole. I, mm (for the solid triangle). b) Determine the moment of inertia around the a- axis for the shaded region; i.e. the triangle with the hole. I, mm (for the triangle with the hole).