## Theorem of perpendicular axis, Mechanical Engineering

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Theorem of perpendicular axis

It states that if IXX and IYY  be the M.I. of plane section about the two mutually perpendicular axes meeting at a point. The M.I. IZZ which is perpendicular to plane and passing through intersection of X-X and Y-Y can be given by the relation

IZZ = IXX + IYY

IZZ  called as Polar moment of inertia also.

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