Question

Moment of inertia of triangular lamina derivation

Answer 1

Consider a rectangle with base and height whose centroid is located at the origin. represents the second moment of area with respect to the x-axis; represents the second moment of area with respect to the y-axis; represents the polar moment of inertia with respect to the z-axis

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Answer 2

$\textbf{Answer is in Attachment !}$