金字塔的水平剖面在任何高度都是正方形，每面的长度也都是229米(751英尺)，惊人地是，其最大的误差小于0.1%。
The horizontal cross section of the pyramid is square at any level, with each side measuring 229 m (751 ft) in length. The maximum error between side lengths is astonishingly less than 0.1%.
其实这个阶段的大多数评估都是高度主观的，并可通过较大的误差范围将其去除。
Most estimates in this phase are, in reality, highly subjective and can be off by wide margins.
依据指挥引导高度误差的不同要求，分别定义了二维指挥引导成功区和三维指挥引导成功区。
According to the different height error requirement of the system, a two dimensional and a three dimensional area for command and guide success are defined.
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