heptagon 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.
September 11, 2001
|September 11 attacks|
|Date||September 11, 2001 8:46 a.m. – 10:28 a.m. (EDT)|
|Target||World Trade Center (AA 11 and UA 175) The Pentagon (AA 77) U.S. Capitol/the White House (UA 93; partially successful diversion from target)|
|Attack type||Aircraft hijackings Suicide attacks Mass murder Islamic terrorism|
There's a five-acre park in the middle of the Department of Defense's Pentagon headquarters, and a small one-story structure sits in the bullseye center of the lawn. “They thought this was the Pentagon's most top secret meeting room, and the entire Pentagon was a large fortress built around this hot dog stand.Jul 2, 2021
If you apply for a Pentagon job requiring a security clearance, you will also need to complete Standard Form 86, Personnel Security Questionnaire administered by the Office of Personnel Management. Jobs requiring security clearances may also require you to be fingerprinted and undergo a background investigation.
Nonagon In geometry, a nonagon (/ˈnɒnəɡɒn/) or enneagon (/ˈɛniəɡɒn/) is a nine-sided polygon or 9-gon. The name nonagon is a prefix hybrid formation, from Latin (nonus, "ninth" + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.
(1) read as follows: “The term 'Pentagon Reservation' means that area of land (consisting of approximately 280 acres) and improvements thereon, located in Arlington, Virginia, on which the Pentagon Office Building, Federal Building Number 2, the Pentagon heating and sewage treatment plants, and other related facilities
A pentagram (sometimes known as a pentalpha, pentangle, pentacle, or star pentagon) is the shape of a five-pointed star polygon. Pentagrams were used symbolically in ancient Greece and Babylonia, and are used today as a symbol of faith by many Wiccans, akin to the use of the cross by Christians.
A regular pentagon has no right angles ( It has interior angles each equal to 108 degrees). An irregular pentagon has at most three right angles, because a fourth would leave 180 degrees to be used for the final angle that is (540 degrees - 360 degrees), which is a straight line.
Pentagon Facts Headquarters of the Department of Defense, the Pentagon is one of the world's largest office buildings. It is twice the size of the Merchandise Mart in Chicago and has three times the floor space of the Empire State Building in New York.
hexagon A six-sided shape is a hexagon, a seven-sided shape a heptagon, while an octagon has eight sides… There are names for many different types of polygons, and usually the number of sides is more important than the name of the shape. In case of two dimensional shapes, a shape with 100 sides is called Hectogon.