How To Find The Circumference Of An Ellipse
Description
This section is from the book "The Tinman's Manual And Builder's And Mechanic's Handbook", by Isaac Ridler Butt. Also available from Amazon: The Tinman's Manual And Builder's And Mechanic's Handbook.
How To Find The Circumference Of An Ellipse
Rule. - Multiply half the sum of the two diameters by 3.1416, and the product will be the circumference.
Example. - Suppose the longer diameter 6 inches and the shorter diameter 4 inches, then 6 added to 4 equal 10, divided by 2 equal 5, multiplied by 3.1416 equal 15.7080 inches circumference.
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