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For example, if you draw a triangle on a flat piece of paper the sum of its angles is equal to two right angles (as you know from elementary geometry ).

比如说，如果你在一张平坦的纸张上画一个三角形，它所有内角之和等于两个直角之和（如你从初等几何中所知的）。

The contents of mathematics in middle school are divided into elementary algebra and plane geometry. Plane geometry is more favorable for training students'understanding of mathematics beauty.

初中数学的内容分为初等代数和平面几何两大部分，平面几何的直观性较强，显然更有利于培养学生对数学美的理解。

In addition, there are works whose pictorial architecture places elementary forms of geometry and formal compositional considerations in the forefront, without losing sight of the inner poetry of the picture.

除此之外，他的作品多以几何图形和线条组成，有着谜一般的诗意。

Using Greek sources, he compiled in Latin selections from elementary treatises on arithmetic , geometry, and astronomy.

他根据希腊材料用拉丁文选编算术、几何与天文的初等读物。

In this paper several problems in the elementary geometry, which seem simple but in fact need thorough analysis, are taken for example to explain how to make use of the knowledge learnt from the higher meths so as to study the problems concerning the eductional reform of the higher maths, which should lead to our consideration.

本文以初等几何中一些看似粗浅实际上需要深入分析的问题为例来说明，如何利用高等数学学到的知识，来研究中学数学等有关高师数学教育改革应引起大家思考的几个问题。

It is started with the Desargues theorems and dual theorems' formulation and proof of the elementary geometry, guaranteed the scientific of the method on the theoretical plane .

本文从Desargues定理及对偶定理的初等几何表述及证明入手，在理论上保证了此种方法的科学性，在证题的过程中可以看到此种方法是具有可行性的。

It is worth mentioning that the Feet, regulation,"sub-Square" in Operations, problem-solving, results, only the Need to "Elementary Geometry" of the axioms, logic, reasoning, we can prove that.

值得一提的是尺、规，"分角尺"的操作、解题、结果，只需"初等几何"的公理、逻辑、推理、就能证明。

Amazing is the "sub-cuirong-yan Square," the manufacture, operation, problem solving, as a result, only "Elementary Geometry" of truth, logical reasoning, we can prove that.

令人惊叹的是《崔荣琰分角尺》的制造、操作、解题、结果，只需"初等几何"的公理、逻辑推理、就能证明。

It has been proposed that the tools structure geometry can be obtained by geometry transformation of elementary wedge pattern Ⅰ,Ⅱ,Ⅲ, and the geometric transformation matrixes have been obtained.

指出楔横轧模具孔型图可以通过基本楔型Ⅰ、Ⅱ、Ⅲ的几何变换构造而成，并求出这些变换的变换矩阵。

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.).

这门课在西方的对应一般叫Linear Algebra，就是苏联人喜欢用高等这个词，你可以在外国教材中心里面找到一本Kurosh的 Higher Algebra。

Foods high in this vitamin include oily fish such as salmon, tuna and, and fish liver oils.

维生素D含量高的食物包括诸如大麻哈鱼、金枪鱼和鲭鱼之类的油鱼以及鱼肝油。

We need you to cosign our public letter demanding that press intimidation cease immediately, and that all charges be dropped.

我们需要您cosign我们的公共信，要求记者立即停止恐吓，并要求所有收费下降。