- The
center of the
incircle is a
triangle center called the triangle's
incenter. An
excircle or
escribed circle of the
triangle is a
circle lying outside...
- In geometry, the
incenter of a
triangle is a
triangle center, a
point defined for any
triangle in a way that is
independent of the triangle's placement...
- diagonals, then the
incenters of the four
triangles are
concyclic if and only if the
quadrilateral is tangential. In fact, the
incenters form an orthodiagonal...
- In geometry, the
incenter–excenter
lemma is the
theorem that the line
segment between the
incenter and any
excenter of a triangle, or
between two excenters...
- □ABCD be an
arbitrary cyclic quadrilateral and let M1, M2, M3, M4 be the
incenters of the
triangles △ABD, △ABC, △BCD, △ACD. Then the
quadrilateral formed...
-
bicentric quadrilateral and O the
center of its cir****circle. Then the
incenters of the four
triangles △OAB, △OBC, △OCD, △ODA lie on a circle. Wikimedia...
-
angle in half. The
three angle bisectors intersect in a
single point, the
incenter,
which is the
center of the triangle's incircle. The
incircle is the circle...
- the
Poncelet point of its vertices. In a
cyclic quadrilateral ABCD, the
incenters M1, M2, M3, M4 (see the
figure to the right) in
triangles DAB, ABC, BCD...
-
tetrahedron is one in
which the
cevians that join the
vertices to the
incenters of the
opposite faces are concurrent. An
isogonic tetrahedron has concurrent...
-
tetrahedron is one in
which the
cevians that join the
vertices to the
incenters of the
opposite faces are concurrent, and an
isogonic tetrahedron has...
