What is the difference between heptagon and septagon

A heptagon is a seven-sided polygon. It is also sometimes called a septagon, though this usage mixes a Latin prefix sept- derived from septua- , meaning "seven" with the Greek suffix -gon from gonia , meaning "angle" , and is therefore not recommended. A heptagon with vertices equally spaced around a circle and with all sides the same length is a regular polygon known as a regular heptagon. Weisstein, Eric W. Explore thousands of free applications across science, mathematics, engineering, technology, business, art, finance, social sciences, and more.

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Virtual vs. I graduated high school in , and as a second career, am helping HS students with their math. I just finished my 6th year of this, and have just one question about the change noted in the title. I recall Septagon, Octagon, Nonagon, Decagon, being figures with sides numbering 7,8,9, As a child, I noted that these prefixes reflected those of the last 4 months on the calendar. From this a teacher explained that the calendar months got shifted around, and that at one time September thru December were, in, fact, months A few years ago, I ran into a seven sided figure and a student telling me it was a Heptagon.

I do understand that Sept is Latin and Hept is Greek, but would like to know when and more important, why, this change was made. Septagon This vox nullius is a learned mistake for heptagon. People of some education make a certain type of error not committed by the multitude, and this word is an example of one such mistake, viz. Knowing that they need a foreign word for seven, they take the familiar Latin word instead of the required but unfamiliar Greek word and concoct the hybrid septagon on the analogy of the common term pentagon.

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