octagon

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octagon

(less commonly), octangle
a polygon having eight sides

octagon

[′äk·tə‚gän]
(mathematics)
A polygon with eight sides.
References in periodicals archive ?
Write a proof showing that the octagon constructed from the square is a regular octagon. The proof can be written in any format.
and used this as a scale factor for a dilation to determine the point (G in Figure 3) which would guarantee a regular octagon. For example, one of the students gave the following directions.
She focused on the top right corner of the square with the cuts (see Figure 4) and let x represent one-half the length of one of the sides of the regular octagon ([bar.CG]).
Since the square was transformed into the regular octagon, the students created a regular octagon first.
Instead of explaining why the octagon was a regular octagon, the 'proof' read more like directions on how to construct the regular octagon.
Yet, there is a unique cut that will transform the parallelogram into the regular octagon (bold cuts shown in Figure 7).