Polar Moment of Inertia of a Circle Radius of a Circle Radius of Gyration of a Circle Second Moment of Area of a Circle area of a Circle formulas A=πr2A=πr2 (Radius) A=πd2/4A=πd2/4 (Diameter) A=C2/4πA=C2/4π (Circumference) Symbol English Metric AA = area in2in2 mm...
Characteristic directions of closed planar motions The area enclosed by the paths of points belonging to each of these reference systems, the polar moment of inertia, and the natural average of a path... Henning Dathe,Riccardo Gezzi - ZAMM - Journal of Applied Mathematics and Mechanics / Zeits...