<Tri-2024-2145>, hint
Let <EAB=<DAB=x, <EAC=<DAC=y.
Since C(1) is tangent to AC at A <DAC=<DBA=y
C(2) is tangent to AB at A <DAB=<DCA=x. Hence triangles DAB and DCA are similar
AD/DC=DB/AD---> AD^2=DB x DC
<EDB=<EDC=x+y=<A, <AEC=ABC, <AEB=<ACB Hence Triangle AEC and ABE are similar
A=DE/DC=DB/DE---> DE^2=DB x DC. Hence DA=DE.
No comments:
Post a Comment