Bars, Rods, Cylinders, Prisms, Columns...
The bars, rods, cylinders, prisms, columns, and such herein ; are all with regular polygons, and the circle, as right angle cross sections.
I start with all these figures having their end faces at right angles to the main body. As examples shown in Fig.-26.
This web page is going to be very simple. I only have one important item to stress!
The Center-line is only where I measure the length or height of these type of figures!
The reason will be more apparent in the web pages coming next. But, for openers: if I took a straight slice through any figure choice shown above, at a 45 degree angle, and then moved further down the figure for another 45 degree slice, but in the opposite direction__ When slicing these objects as such, the outside height is no longer equal to the center-line, except at two points.
The logic for doing this is: Why teach a math formula, that applies for one object or a few, and then when that object has done a proportionate change, it requires different math formulation? Especially when one single type formula will handle a multitude of figures. This, upcoming in next web page...