为了构造合适的长度，需要具备一些三角几何学的知识。
To construct the correct lengths some knowledge of triangular geometry is necessary.
看起来毕达哥拉斯的定理，似乎来自于欧几里德的三角形理论，从欧几里德几何学的发现中可以简单地推理出来。
It seems that the proof of Pythagoras's theorem comes pretty much from just consulting the ideas of Euclidean triangle, the exhume of Euclidean geometry and simply doing inferences from those.
约翰• 邓恩别出心裁、慧心独具，善于使用几何学知识和意象，尤其是三角意象和圆形意象。
John Donne was unique and singular at using geometry knowledge and imagery, particularly the triangle image and the circle image.
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