Question

Polar moment of inertia of an equilateral triangle of side x is given by

Answer 1

Answer:

Equilateral triangle formulas for calculations are given in the "List of ... Side length [a] ... Second moment of area about x axis [Ix], --- ... Area moment of inertia, Ix, Ix = 0.01804a4.

Answer 2

Polar moment of inertia basically describes the cylindrical object's (including its segments) resistance to torsional deformation when torque is applied in a plane that is parallel to the cross-section area or in a plane that is perpendicular to the object's central axis.