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" If the three sides of a plane triangle be replaced by three circles, then the circles touching these, which correspond to the inscribed and escribed circles of a plane triangle, are all touched by another circle. "
A treatise on spherical trigonometry, by W.J. M'Clelland and T. Preston - الصفحة 163
بواسطة William John M'Clelland - 1886
عرض كامل - لمحة عن هذا الكتاب

A Sequel to the First Six Books of the Elements of Euclid: Containing an ...

John Casey - 1886 - عدد الصفحات: 262
...cuts the circles 0, 0' orthogonally. Prop. 11. — DP.. HAET'S EXTENSION OP FEITEBBACH'S THEOKEM : — If the three sides of a plane triangle be replaced by three circles, then the circles touching these, which correspond to the inscribed and escribed circles of a plane triangle,...

Proceedings of the Edinburgh Mathematical Society

Edinburgh Mathematical Society - 1893 - عدد الصفحات: 352
...(1892), where a proof is also given of the following extension (due to Dr Hart) of Feuerbach's theorem : If the three sides of a plane triangle be replaced by three circles, then the circles touching these, which correspond to the inscribed and escribed circles of a plane triangle,...

A Sequel to the First Six Books of the Elements of Euclid: Containing an ...

John Casey - 1895 - عدد الصفحات: 216
...cuts the circles 0, 0' orthogonally. Prop. 11. — DR. HAET'S EXTENSION OP FEFEEBACH'S THEOEEM : — If the three sides of a plane triangle be replaced by three circles, then the circles touching these, which correspond to the inscribed and escribed circles of a plane triangle,...

Proceedings of the Edinburgh Mathematical Society, المجلد 11

Edinburgh Mathematical Society - 1893 - عدد الصفحات: 256
...(1892), where a proof is also given of the following extension (due to Dr Hart) of Feuerbach's theorem : If the three sides of a plane triangle be replaced by three circles, then the circles touching these, which correspond to the inscribed and escribed circles of a plane triangle,...




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