Second moments of area

If C is the centroid of area A in Figure 131.1, then: Figure 131.1 https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429294402/7a019bd2-8e3e-42f5-a1b0-42593cc08f27/content/fig131_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> https://www.w3.org/1998/Math/MathML"> I DD = I GG + Ad 2 https://s3-euw1-ap-pe-df-pch-content-public-u.s3.eu-west-1.amazonaws.com/9780429294402/7a019bd2-8e3e-42f5-a1b0-42593cc08f27/content/eq4444.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>