Supplementary angles that are not a linear pair

This demonstrates supplementary angles because they are consecutive interior angles on to parallel lines. (The angle lines that are drawn are not meant to mean that the angles are equal, rather to indicate which angles I am talking about). Supplementary angles are two angles that add up to 180*. This design is used for keeping the sign up and without these angles it would be slanted.

Composite Solids

For the final blog of the year the theme is composite solids. A composite solid is when two solids are combined to make 1 solid. In the example shown 4 cylinders are stacked on top of each other to create the actual bottle, and then a smaller cylinder is stack to create the top. This design is used for style but also to create more space within the solid.

A 36-gon?

The line that is traced in the picture is actually a line within the object. It represents where the two pieces were combined, plus it also shows the line in which the pattern of the nozzles follow. Without this line to arrange the nozzles the water pressure would not be spread out, and then the shower would not be as useful. Also this is the way the pieces were attached. This shape is a 36 sided polygon, since it has 36 sides and is a closed shape without curves.