Geodesic
Oblique altitudes and bisectors
In this paper the concepts of (1) oblique altitudes of a triangle and (2) oblique bisectors of the sides of a triangle are introduced as a generalisation of the concepts of altitudes and of perpendicular bisectors. Several properties of oblique altitudes and oblique bisectors will be presented.
Classification : 51M04 
@article{VM_2003_5_4_a1,
     author = {Paulus Gerdes},
     title = {Oblique altitudes and bisectors},
     journal = {Visual Mathematics},
     publisher = {mathdoc},
     volume = {5},
     number = {4},
     year = {2003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/VM_2003_5_4_a1/}
}
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%T Oblique altitudes and bisectors
%J Visual Mathematics
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%I mathdoc
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Paulus Gerdes. Oblique altitudes and bisectors. Visual Mathematics, Tome 5 (2003) no. 4. http://geodesic.mathdoc.fr/item/VM_2003_5_4_a1/