With some examples in plane geometry, the author indroduces how to use Desargues theorem to simplify the proofs of problems of collinear points and concurrent lines.
利用代沙格定理及其逆定理 ,对平面几何的几个共线点和共点线的问题给出简捷的证法。
With some examples in plane geometry, the author indroduces how to use Desargues theorem to simplify the proofs of problems of collinear points and concurrent lines.
利用代沙格定理及其逆定理 ,对平面几何的几个共线点和共点线的问题给出简捷的证法。
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