Using only elementary geometry, determine angle x. Provide a step-by-step proof.
利用初等几何 求角x. 写出求解过程.
The second inspect the two typical cases: computer proof of four-color conjecture and establishing of fractal geometry.
第二章考察了计算机在数学应用中的两个具体案例：四色猜想的计算机证明和分形几何的建立。
In this paper, the existence theorem of midpoint chord of quadratic curve, as well as its proof, is given via methods of projective geometry and polarity principle.
文章利用射影几何方法及配极原理给出二次曲线中点弦存在性定理的证明。
It has many applications to calculations and proof of geometry.
它们在有关的计算和证明中应用非常多。
All Chinese can be proud of the achievements of their mathematicians in differential geometry and their contributions to the completion of the proof of Poincare conjecture.
所有中国人都应该为中国数学家在微分几何领域所取得的成就，和对庞加莱猜测的贡献而感到骄傲。
All Chinese can be proud of the achievements of their mathematicians in differential geometry and their contributions to the completion of the proof of Poincare conjecture.
所有中国人都应该为中国数学家在微分几何领域所取得的成就，和对庞加莱猜测的贡献而感到骄傲。
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