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标题: 关系 [打印本页]

作者: jincao 时间: 2006-4-27 21:17
标题: 关系
见图.

作者: blahor 时间: 2006-4-28 17:14
first you should sketch a ellipse,and convert it to be a construction.then you can sketch the cycle that you need on the reference of the ellipse ,then you will find it proper for what you require.

作者: blahor 时间: 2006-4-28 17:16
namely ,the centre of the cycle should be located on the ellipse.
if what I said is wrong.plese inform me .thank you

作者: jincao 时间: 2006-4-30 21:20

原帖由 blahor 于 2006-4-28 17:14 发表
first you should sketch a ellipse,and convert it to be a construction.then you can sketch the cycle that you need on the reference of the ellipse ,then you will find it proper for what you require.

请看下图

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