Math Puzzle for September 26, 2025

This sigil may have magical powers, assuming you were alive and well in geometry class

Alameda Post - a math diagram

A sigil is an inscribed or painted symbol considered to have magical powers. This magic sigil could win you a gift card for Tucker’s Ice Cream if you can solve the puzzle.

The base is a Golden Rectangle with an area of 58298.412748964 square meters. A large equilateral triangle shares one side of the Golden Rectangle.

Find the area A of the circle above the rectangle and tangent to the small triangle.

Send the answer to [email protected] and you might win a Tucker’s gift card.

The answer to last week’s puzzle was: Tristan finishes the 10K in 46.837383 minutes.

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

Copied!

KQED Curated Content
Thanks for reading the

Nonprofit news isn’t free.

Will you take a moment to support Alameda’s only local news source?