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Given :-AF parallel BD
AF and BC are angle bisector of angle EAB and angle DBA
To prove :- AF ll BC
Proof :-a) EA ll BD .......given
b) angle EAB congruent angle ABD.......Alternate angle test
c)(half) angle EAB = (half ) angle ABD....Multiply by (half)
angle FAB=angle ABC......AF and BC are angle bisector
Therefore AF ll BC .......Alternate angle test
AF and BC are angle bisector of angle EAB and angle DBA
To prove :- AF ll BC
Proof :-a) EA ll BD .......given
b) angle EAB congruent angle ABD.......Alternate angle test
c)(half) angle EAB = (half ) angle ABD....Multiply by (half)
angle FAB=angle ABC......AF and BC are angle bisector
Therefore AF ll BC .......Alternate angle test
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