因此我们必须求出三角形的面积。
这就是空间三角形的面积公式。
That's the formula we've seen for the area of a triangle in space.
看看三角形的面积。
比较一下这些三角形的面积。
谁知道如何计算三角形的面积，请举手。
Who knows how to calculate the area of a triangle, please raise your hand.
计算下面各三角形的面积。
以下哪个三角形的面积与R的面积相等？
每个三角形的面积等于拼成的平行四边形面积的。
The area of every triangle equals the area of the parallelogram.
三角形的面积等于任何一边与那边上的高的乘积的一半。
The area of a triangle is equal to half the product of any side and the altitude on that side.
平面上有一个三角形,用两个向量描述,记作A、B，怎样求三角形的面积？
Let's start with a triangle in the plane Well, then we need two vectors to describe it say A and B here. How do we find the area of a triangle?
在一个三角形的面积14.000平方米，有6个建筑物前包装厂，程序作了充分自由的保护或拆除这些建筑。
On a triangular area of 14.000 sq mare 6 buildings of the former packaging plant, the program gave a full liberty on the conservation or the demolition of these buildings.
一位计算机系的毕业生接受微软的面试，面试官给出最后一个问题：“已知一个直角三角形的斜边为10，斜边上的高为6，请问这个三角形的面积是多少？”
Interviewer: Ok, so one last question. A right triangle has a hypotenuse equal to 10 and an altitude to the hypotenuse equal to 6.
然后你可以看到在这三角形楔形物里的面积。
Then, you can look at the amount of area inside this triangular wedge.
为了实现这一目标，Takenake将先挖一个每边长400米的地基，其面积相当于几个街区(哈利·法塔的地基仅为一个边长90米左右的三角形)。
To achieve this, Takenake will first start with a base that is 1300 feet per side, a footprint that equates to several city blocks (Burj Khalifa's triangular footprint is just 300 feet or so).
在这个项目中，利用它三角形面积和L形平面，通过在边缘植入电梯这一核心策略，实现了可售面积的最大化。
In this, with its triangular plot and L-shaped plan, maximum saleable area is achieved by strategic placement of the lift core at the edge.
下列哪三角形与三角形r的面积相等？
推广了经典的圆内接三角形面积最大值问题。
Classical maximum area of inscribed triangle is extended in this paper.
对于网格模型简化问题，本文提出了一种基于网格顶点曲率加权该顶点邻接三角形面积的顶点删除简化算法。
This algorithm removes vertices of the mesh according to the curvature of the vertex weighted by the area of the triangles which are adjacent to that vertex.
给出从给定正方形中裁出边长(或面积)最大的正三角形的方法及其严格证明。
In this paper, we give a method for cutting out a maximal equilateral triangle from a square and a strict proof of this method.
本文给出外、内三角形有向面积的两个定理及其若干推论，揭示这些定理与三角形、拿破仑三角形等一些已知结论之间的联系。
In this paper, two theorems of directed areas for exterior (inner) triangles are given, the relations between these theorems and some known results of triangles and Napoleon triangles are revealed.
推导出用三顶点的测地坐标计算地球椭球面上三角形面积的公式。
The formula for area of triangle on ellipsoid by means of geodesic coordinate is derived in this paper.
本文从曲柄滑块机构中各杆件组成的三角形面积观点出发，分析了曲柄滑块机构中各参数与其面积的内在联系，从而得出相关参数的设计准则。
Based on the area of a triangle, the paper analyses the interior connection between crank structure and areas of triangle, then provides the design rules for its data.
摘要把紧密相连的圆环构成的圆盘以渐开线展开成等面积的直角三角形，得出了较为直观的由周长和半径表示的圆面积公式。
The disk, which is composed of continuous annuluses, can expand equivalent trangle by asymptotice line. We can obtain the circular area which is visually expressed by circumference and radius.
三角形荷载作用在无限长的条形面积上。
Triangularly distributed load on an infinitely long strip-area.
这间面积很小的房子建在河流和道路交叉的一个三角形地带。
This is a very small house built on the triangle site which the river and the way were crossed and made to the acute Angle.
研究弹道跟踪系统的异常数据识别问题，导出了一种基于三角形和四边形面积的异常数据识别的搜索方法。
In this paper, a search method based on the area of triangle and quadrilateral is presented to solve the problem of recognition of abnormal data in trajectory tracking system.
研究弹道跟踪系统的异常数据识别问题，导出了一种基于三角形和四边形面积的异常数据识别的搜索方法。
In this paper, a search method based on the area of triangle and quadrilateral is presented to solve the problem of recognition of abnormal data in trajectory tracking system.
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