Section Properties calculates area moment of inertia, section modulus, radius of gyration, extreme point and area for the follow sections: Square at CenterSquare Rotated 90 degreesSquare at EdgeSquare Tube at CenterSquare Tube Rotated 45 DegreesRectangle at Center Rectangle at EdgeRectangle at CornersRectangle at a specified AngleRectangle Tube at CenterSolid Round at CenterTube/Pipe at CenterHalf Round at CenterHalf Tube/Pipe at CenterHexagon at CenterHexagon at CornersOctagon at CenterTriangle at CenterTriangle at EdgeTrapezoid at CenterThe app also calculates the Mass Moment of Inertia for the following objects: Hollow Shaft CylinderRectangular PlaneRectangular Plate at EdgeSolid Shaft CylinderSolid Sphere Thin Walled SphereThin Walled Cylinder Please send us any comments, suggestions or questions through our website.