# Where is the Pentagon?

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### Where is the Pentagon?

the **Pentagon** (in English: The **Pentagon**) **is** a building that **is located** in Arlington, Virginia, near Washington, the federal capital of the United States. This building houses the headquarters of the Department of Defense. In 2009, more than 26,000 people worked there, including civilians and soldiers.

### How do you write pentagon?

The term ” **Pentagon** » derives from the Latin pentagonum of the same meaning, substantivation of the adjective pentagonus, itself borrowed from ancient Greek, πεντάγωνος (pentágônos), « pentagonal », « which has five angles, five sides ».

### What is a 6-sided polygon called?

We **appointed** a **polygon** depending on the number of **sides** : where the triangle is a **polygon** who has three **sides** ; where the quadrilateral is a **polygon** who has four **sides** ; where the **Pentagon** is a **polygon** who has five **sides** ; oh**hexagon** is a **polygon** who is six **sides** ; where the heptagon is a **polygon** who is seven **sides** ; oh…

### How to calculate the reference dimension of a pentagon?

In the pentagon, we find two right triangles 36 – 54. They are joined by one side of the right angle to form two isosceles triangles (see figure below). The reference dimension is the hypotenuse of one of them: R = 1, the radius of the circumscribed circle of the pentagon.

### What are the basic triangles in the Pentagon?

Basic right triangle in the pentagon The two colored triangles in the figure are important because they allow the calculation of the lengths of the various segments included in the regular pentagon. Below are the main calculation elements. In the pentagon, there are two right triangles 36 – 54.

### When was the Pentagon built?

Construction of the Pentagon (view from the northwest), July 1, 1942. Fighting the fire caused by the attack of September 11, 2001. On the lawn, a piece of wreckage from American Airlines Flight 77.

### How to calculate the diagonals of a pentagon?

Note the fundamental property of its diagonals: length equal to the golden number and cut diagonals inverse to the golden number (Illustration below). Angles of the regular pentagon SeeApproximation of the tangent of 72°/ of the sine of 36°/ Riddles with Diagonal angles and their cut in golden ratio / Nesting pentagons