Math CentralQuandaries & Queries


Question from Arvie, a parent:

I have seen your answer to Kay on how she can find the length for the sides of an octagon for a 4 foot window, but what is the angle that will need to be cut to get to 4 feet


I copied the diagram from my answer to Kay that you mentioned, and altered it slightly to include some labels.


Since this is a regular octagon the distance from A to B is the same as the distance from C to A. Thus triangle ABC is an isosceles right triangle. Thus angles ABC and BCA each have a measure of 45o.

I hope this helps,

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