Tag Archives: second moment of area

Section Properties from Layers

Posted on 19/03/2008 by dougaj4

An alternative to finding the section properties of irregular polygons from the coordinates of the corners is to divide the shape into rectangular or trapezoidal layers.  The properties of the shape may then be found by simply summing the properties … Continue reading →

Posted in Maths, Newton, Uncategorized | Tagged , , , , | 1 Comment

Section Properties from Coordinates

Posted on 09/03/2008 by dougaj4

The area of irregular closed polygons defined by coordinates may be conveniently calculated by summing the areas of adjacent trapeziums, as shown below.   The area of each trapezium is calculated from the X axis.  Note that with the apex coordinates … Continue reading →

Posted in Maths, Newton | Tagged , , , , | 2 Comments