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

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 template

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如图已知点P是圆O外一点过P做圆O的切线PAPB切点分别为AB过P做一条割线交圆O于EF若2PA=PF取PF的中点D连接 sketch template

四边形ABCD内接于圆其边AB与DC的延长线交于点PAD与BC的延长线交于点Q．由Q作该圆的两条切线QE和QF切点分别为EF．求证P sketch template

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