The figure shows an equilateral triangle ABC with the incircle O (F is the tangency point on
BC). Circles O_{1} and O_{2} are tangent to circle O and
to the sides of angles A and C (D and E are the tangency points on AC).
If FT is tangent to circle O_{1} at T, prove that FT = DE.
See also:
Kaleidoscope of problem 1314 using iPad Apps
Selected Topics
