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Math Puzzle for February 28, 2025

by Jeff Smith On In Puzzles | Comments Disabled

What the heck is so regular about a regular polygon?

Alameda Post - a regular nonagon inscribed within a circle. There are nine small areas created in between the circle and the nonagon. One of the areas is shaded. [1]

Above is a regular nonagon inscribed within a circle.
The shaded region has an area of 2874.296608 square meters.
Find circumference C of the inscribing circle.

C = ______ meters

First correct answer to arrive at [email protected] [2] wins a Tucker’s gift card.

Last week’s winner [3] was Jerry Harrison with AreaABO = 2166 and Area CDO = 3174.

Jeff Smith is a former Math teacher and a retired US Navy Lieutenant Commander. Reach him at [email protected] [2].