Well, honey, an octagonal prism is a shape with eight sides and two identical octagon faces. It's like a fancy pencil sharpener or a stop sign, but less useful and more mathematically intriguing. So, if you ever need to impress someone at a cocktail party with your geometry knowledge, just drop the term "octagonal prism" and watch them swoon.
stuff
There are few "real life" examples. Tin boxes, for Quality Street, for example, or eight-sided glasses are two.
A pencil.
Probably a multiplication and addition symbol
tent
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yes
Many antique black powder rifle barrels were made in an octagonal shape.
a doghouse
There are few "real life" examples. Tin boxes, for Quality Street, for example, or eight-sided glasses are two.
dome
A pencil.
A tent
A solid brick is a rectangular prism. (this one example of many)
A gaming die.
A real life example is a Toblerone chocolate bar which is in the shape of a triangular prism.
If you asking where you'd find them in the real world - Binoculars and telescopes are two examples.