Let
be a triangle, let
is the incenter and
the first and the secon Fermat points. Construct circle with center
and radii
,
is radii of incircle. This circle meet three sie
at
. Prove that:
1-
is an equilateral triangle.
2-
is an equilateral triangle.
3-
homothetic the first Isodynamic Equileteral triangle (respectively with
)
4-
homothetic the secon Isodynamic Equileteral triangle (respectively with
)
5-
perspective with the first Napoleon Equileteral triangle (respectively with
)
6-
perspective with the secon Napoleon Equilateral triangle (respectively with
)

2-

3-


4-


5-


6-


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