两圆交于a，b，过ab延长线上点p作两圆的4条切线，如何证明不是弦的切点连线交点分别为内外位似中心？ 知乎 Sketch Coloring Page

两圆交于a，b，过ab延长线上点p作两圆的4条切线，如何证明不是弦的切点连线交点分别为内外位似中心？ 知乎 Template

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tomski两圆交于a，b，过ab延长线上点p作两圆的4条切线，如何证明不是弦的切点连线交点分别为内外位似中心？ 知乎 coloring

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若相交两圆的公共弦长是12，圆心距是10，其中一圆的半径长为10，则另一圆的半径长为 百度教育 sketch template

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