一个三角形的所有角度之和是180度。
只有在平坦的宇宙中，空间才符合标准的几何规律——三角形的内角和精确地等于180度，平行线永远不相交。
Only in a flat universe does space obey all the standard geometry-class rules-the angles of a triangle add up to exactly 180 degrees and parallel lines never meet.
你可以使用初等的几何知识例如三角形的三个内角各为180度和三角形全等的规则(边-角-边等)。
You may only use elementary geometry, such as the fact that the angles of a triangle add up to 180 degrees and the basic congruent triangle rules (side-angle-side, etc.).
这个三角形其中的一个底角是60度。
简而言之，夹角是120度的三角形形成第三边长度是3的平方根乘以手臂的长度。
Similarly 120 degrees will form a side the length of which is the square root of 3 times the arm length.
最后180度的夹角的三角形形成第三边的长度是臂长的2倍，4的平方根。
Finally the 180 degree Angle will produce a side of length 2 arms, the square root of 4.
以三角形靶标的视觉锐度为基准，设计了无缝三角形网格划分算法，对典型识别概率的实测红外目标图像进行了等效三角形划分，确定了目标对应的等效三角形数目；
The infrared target in the real background were closely meshed into many equivalent triangle patterns by considering visual acuity, and the number of triangle pattern was statistically determined.
圆形或三角形的耳环也会增加脸部的圆润度。
You can also choose circular or triangular earrings; they will add roundness to your face.
而采用直角三角形法、换面法和旋转法求出一般位置直线的实长对于提高工作效率和数据的准确度有着重要的意义。
The essay recommends three ways of assessing the substantial length of straight line in average positions, which turned out significance in improving efficiency and precision of data.
应用广义协调元理论，通过增加内参位移的方法，构造了两个具有旋转自由度的三角形膜元。
Based on the theory of generalized conforming element, two triangular membrane elements with rotational degree of freedom are developed by introducing internal parameters into its displacement field.
本文讨论一个四自由度三角形非协调膜元的整体超收敛性，外推和亏量校正。
In ha peper, a four-degree triangle nonconforming membrance element is considered and the global superconvergence estmates, the extrapolation and the defect correction schemes are presented.
介绍了一种采用斜光学三角形测量结构和基于虚拟精密测量基准的太阳帆板平面度无接触测量系统及误差补偿方法。
A solar panel substrate planeness non contact system, which employ declinate optical triangulation method, and bases on virtual precise benchmark, is presented.
应用于具体构造一个十自由度的三角形单元，并给出误差估计。
A triangular element with ten degrees of freedom is specifically constructed by applying this method and its error estimate is given.
本文介绍了平直度定义、激光三角形法测量平直度的原理以及在我国的应用情况和安装使用中应注意的问题。
This paper introduces the theory of laser triangle rule to measure flatness and its application in our country. It also gives the problems in setting should be pay attention to.
本文介绍了三角形准则求平面度误差的编程思路，程序验算结果正确。
Programming approach about how to use triangle rule to seek flatness error is introduced, and the results show that the arithmetic is correct.
对于高的太阳，60度以上的高度做饭，两个小组提出的三角形，每饱和磷脂一侧机翼，被放置在梯形基地。
For high-sun altitude cooking, above 60 degrees, the two forward triangular panels, on each DSPC side wing, are placed over the trapezoidal base.
分析得到了粗糙度与耐磨性关系曲线，结果表明三角形晶粒以及适中的粗糙度能有效的提高薄膜耐磨性。
Grain shape and surface roughness are indicated to codetermine the abrasion resistance of the film. Further, the ar film with triangular grain and moderate roughness shows good abrasion resistance.
分析得到了粗糙度与耐磨性关系曲线，结果表明三角形晶粒以及适中的粗糙度能有效的提高薄膜耐磨性。
Grain shape and surface roughness are indicated to codetermine the abrasion resistance of the film. Further, the ar film with triangular grain and moderate roughness shows good abrasion resistance.
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