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Topic: Pentadecagon

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	Pentadecagon - Wikipedia, the free encyclopedia
		In geometry, a pentadecagon is any 15-sided, 15-angled, polygon.
		A regular pentadecagon has interior angles of 156°, and with a side length a, has an area given by
		'==Pentadecagon construction== A regular pentadecagon is constructible with straightedge and compass.
	en.wikipedia.org /wiki/Pentadecagon (110 words)

	pentadecagon - OneLook Dictionary Search
		We found 5 dictionaries with English definitions that include the word pentadecagon:
		Tip: Click on the first link on a line below to go directly to a page where "pentadecagon" is defined.
		Pentadecagon : Eric Weisstein's World of Mathematics [home, info]
	www.onelook.com /?w=pentadecagon (86 words)

	A History of Science Volume I - Part VI (Site not responding. Last check: 2007-11-06)
		His merit consists rather in the accuracy with which he made his observation than in the novelty of the conception; for it is recorded that Eudoxus, a full century earlier, had remarked the obliquity of the ecliptic.
		That observer had said that the obliquity corresponded to the side of a pentadecagon, or fifteen-sided figure, which is equivalent in modern phraseology to twenty- four degrees of arc.
		But so little is known regarding the way in which Eudoxus reached his estimate that the measurement of Eratosthenes is usually spoken of as if it were the first effort of the kind.
	www.worldwideschool.org /library/books/sci/history/AHistoryofScienceVolumeI/chap37.html (1699 words)

	Pentadecagon (Site not responding. Last check: 2007-11-06)
		A construction that is hardly ever seen today, the construction of the pentadecagon (15 sided polygon!) is the combination of the constructions of a pentagon and triangle!
		A pentadecagon has a central angle of 24°.
		Points G and H are two points of the pentadecagon.
	hptgn.tripod.com /pentadecagon.htm (145 words)

	Chapter Twenty Nine
		of the [regular] Pentadecagon inscribed in the circle with radius 1, the side [is found from root of the three numbers]
		Which is equal to the length of the chord subtended by the angle12
		Let the side of the octagon be given as 6: the side of the pentadecagon is required, inscribed in the same circle as the given octagon.
	www-history.mcs.st-and.ac.uk /Miscellaneous/Briggs/Chapters/Ch29.html (846 words)

	Geocaching Log: Lincoln, MA
		Lincoln, MA Did 2.5 caches today: Cow Cache and Lincoln Logic were successful finds.
		DeCordova's Crooked Pentadecagon (another Geometry cache) was much harder and so we weren't able to finish it today.
		We got a little turned around on question #10 and from there it all fell apart.
	www.drwren.com /geocache/archives/000088.html (91 words)

	[No title]
		What is the name of the polygon that has 104 diagonals?
		What is the sum of the exterior angles of a pentadecagon?
		Complete the table using the formulas listed on the first page.
	www.tenafly.k12.nj.us /~jmoreng/Geometry/Chapter07/WS{7.3}.DOC (227 words)

	Log by TedTerry for DeCordova's Crooked Pentadecagon (Multi-cache) (Site not responding. Last check: 2007-11-06)
		Log by TedTerry for DeCordova's Crooked Pentadecagon (Multi-cache)
		This was a "fun" geocache, and it taught us:
		Use of this Web site constitutes acceptance of the
	geocaching.com /seek/log.aspx?LUID=86e21623-9414-4ccc-a960-35c09184cfdc (80 words)

	Polygon - BIT OF INTELLIGENCE Card Set Regular Polygons - (Site not responding. Last check: 2007-11-06)
		Polygon - BIT OF INTELLIGENCE Card Set Regular Polygons -
		BIT OF INTELLIGENCE cards includes the following common polygons: Equilateral Triangle, Square, Pentagon, Hexagon, Heptagon, Octagon, Nonagon, Decagon, Dodecagon, and Pentadecagon.
		Each card is 11" x 11", printed in full color, and laminated to last for generations.
	www.gentlerevolution.com /store/prods/POL-BI-000.html (118 words)

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