Posts Tagged ‘nonagon’

Nonagon: The Video

August 2, 2008

They Might Be Giants has been doing videos and podcasts for kids. One of their recent releases (from earlier this year) is a video all about one of our favorite polygons: the nonagon! Several other polygons make guest appearances as well.

You can see the video below. The first minute or so is introduction, followed by the nonagon song, one about the letter O, and then a good-bye (5:32 total).

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More glass polygons

July 3, 2008

Houston, we have nonagons! The house that we just stayed at on the beach, the one with the neat-looking but nonfunctional Tide Clock, redeemed itself mathematically by having glasses in the shape of nonagons:

Does that look like I faked it? Here’s the unedited picture, in case you don’t believe me:

And just so the other polygonal glasses don’t get jealous, there was also a hexagon glass:

These join the decagon mug in the polygonal kitchenware Hall of Fame.

Real life nonagons: Bahá’í Houses of Worship

April 8, 2008

The Bahá’í Faith was founded about 150 years ago by Bahá’u’lláh and has followers from all over the world. According to Bahá’í International Community,

the Bahá’í Faith brings new social principles appropriate to the needs of a global society, such as the oneness of mankind, the equality of rights and opportunities for men and women, the abolition of all forms of prejudice, the essential harmony of science and religion, universal education, the need for a universal auxiliary language, and the elimination of extremes of poverty and wealth.

From a mathematical point of view, an interesting fact about the Bahá’í Faith is that all Houses of Worship must have nine sides. There are currently seven temples in the world (plus another that had to be demolished and yet another being built), and while they each have a unique design, they all exhibit this nonagon structure. Click here to see photographs of the temples and satellite pictures showing their nine-sided shapes!

Money Money Money

January 20, 2008

dollar-coin.jpgJust so you don’t think that the Harry Potter game is the only place to find cool polygonal coins, here’s a question for you: what shape is the Susan B. Anthony dollar? Yes, it’s round, but if you look more closely you’ll see the outline of a regular hendecagon — an 11-sided polygon! Click here for a larger Susan B. Anthony dollar, plus several more pictures of polygonal coins!

Grocery Store Polygons: Cookie Cake Tops

January 13, 2008

heptagon.jpgThe post two days ago (Junk Food Geometry) focused on edible polygons, but perhaps my favorite examples of grocery store polygons are inedible: the cookie cake tops at Wegmans. The aspect that stood out initially to me is that they are non-standard polygons. The medium sized one, shown to the left, is a heptagon! This cookie top and a pillbox we once found are the only two real-life examples I’ve seen of regular heptagons.  Edited to add :  of course, within days I found heptagons in a Harry Potter game and in coins. Click to read more and see pictures!