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In geometry, a spherical segment is the solid defined by cutting a sphere or a ball with a pair of parallel planes. It can be thought of as a spherical cap with the top truncated, and so it corresponds to a spherical frustum. The surface of the spherical segment (excluding the bases) is called spherical zone. Geometric parameters for spherical ...
The following year, the important Battle of Điện Biên Phủ was fought between the Việt Minh (led by General Võ Nguyên Giáp), and the French Union (led by General Henri Navarre, successor to General Raoul Salan). The siege of the French garrison lasted fifty-seven days, from 17:30, 13 March to 17:30, 7 May 1954.
Trung Thu is a commune (xã) and village of the Tủa Chùa District of Điện Biên Province, northwestern Vietnam This page was last edited ...
This article about a location in Điện Biên province, Vietnam is a stub. You can help Wikipedia by expanding it.
In geometry, a spherical cap or spherical dome is a portion of a sphere or of a ball cut off by a plane. It is also a spherical segment of one base, i.e., bounded by a single plane. If the plane passes through the center of the sphere (forming a great circle ), so that the height of the cap is equal to the radius of the sphere, the spherical ...
Militarily there was no point in France fighting on, as the Viet Minh could repeat the strategy and tactics of the Dien Bien Phu campaign elsewhere, to which the French had no effective response. [95] News of Dien Bien Phu's fall was announced in France several hours after the surrender, around 16:45, by Prime Minister Joseph Laniel.
Điện Biên Đông is a rural district of Điện Biên province in the Northwest region of Vietnam. The district is predominantly mountainous, and was established in 1995. [1] As of 2003, the district had a population of 48,990. [2] It covers an area of 1,206 km 2.
In geometry, a spherical sector, [1] also known as a spherical cone, [2] is a portion of a sphere or of a ball defined by a conical boundary with apex at the center of the sphere. It can be described as the union of a spherical cap and the cone formed by the center of the sphere and the base of the cap.