When an Oval is Not an Oval

Sunday I went out to walk on a local MA walking track, the oval type, that had been plowed, sort of. I needed to add some step to my daily life, as Sundays I am to much in the sedentary frame of mind. I saw this sign.

Really.

When I was in Jr. High, then again High School and then again in Undergrad, the circumference of an ellipse was a constant.

New Math I guess.

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