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The area of triangle ABC can also be expressed in terms of dot products. Taking vertex A {\displaystyle A} to be the origin and calling translation vectors to the other vertices b {\displaystyle \mathbf {b} } and c {\displaystyle \mathbf {c} } ,
Tam Cốc, literally "three caves", consists of three natural caves — Hang Cả, Hang Hai, and Hang Ba — on the Ngô Đồng River. [2] [3] Tourists are taken in small boats along the river from the village of Ván Lám, through rice fields and limestone karsts, through the caves, and back. Local women serve as guides and attempt to sell ...
Quảng Bình is a southern coastal province in the North Central Coast region, the Central of Vietnam.It borders Hà Tĩnh to the north, Quảng Trị to the south, Khammouane of Laos to the west and the Gulf of Tonkin (South China Sea) to the east.
Gia Lai is a northern mountainous province in the Central Highlands region, the Central of Vietnam.It borders Kon Tum in the north, Quảng Ngãi in the northeast, Bình Định in the east, Phú Yên in the southeast, Đắk Lắk in the south and Ratanakiri of Cambodia in the west.
Dien Bien Phu was a serious defeat for the French and was the decisive battle of the First Indochina war. Although the French and State of Vietnam armies were still strong the North and the Việt Minh had become exhausted after the battle while Dien Bien Phu was not geographically strategic, the battle would thus heavily influence the outcome ...
The Battle of Ấp Bắc was a major battle fought on 2 January 1963 during the Vietnam War in Định Tường Province (now part of Tiền Giang Province), South Vietnam. ...
A triangle with sides a, b, and c. In geometry, Heron's formula (or Hero's formula) gives the area of a triangle in terms of the three side lengths , , . Letting be the semiperimeter of the triangle, = (+ +), the area is [1]