Centroids of regular-shaped areas

Shape

Figure

Description: http://www.thecartech.com/subjects/Mechanics_of_Materials/Centroids_of_regular-shape_areas_files/image001.png

Description: http://www.thecartech.com/subjects/Mechanics_of_Materials/Centroids_of_regular-shape_areas_files/image002.png

Area

Square

 

Rectangle

Circle

Triangle

 

 

 

 

 

 

Second & Polar moments of area of regular-shaped areas

Shape

Figure

Ixx

Iyy

J=Ixx+Iyy

Square

Rectangle

Circle

Triangle

http://en.wikipedia.org/wiki/List_of_area_moments_of_inertia