讨论了圆的切线及两圆内外公切线的一般求法及步骤。

The general ways and procedures of working out internal and external co-tangents of circles are discussed.

youdao

讨论了圆的切线及两圆内外公切线的一般求法及步骤。

The general ways and procedures of working out internal and external co-tangents of circles are discussed.

youdao