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## Main Question or Discussion Point

The theorem of pappus seems too simple that i do not get it.

ok

suppose I have the 1. (x cm., y c.m) meaning i have the x and y center of mass (the centroids). the center of mass is of some function

2. y(x) how do i find the volume when i revolve this region about the line 3. y(x) = mx+b

thank you

ok

suppose I have the 1. (x cm., y c.m) meaning i have the x and y center of mass (the centroids). the center of mass is of some function

2. y(x) how do i find the volume when i revolve this region about the line 3. y(x) = mx+b

thank you