Question

In figure 1,AB=AD and BC=DC.
Prove that :(1)AC bisects A
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Answer 1

Answer:

we have angle1=angle2 and angle3=angle4

=angle1+angle3=angle2 +angle4

=ACD=BDC.

those in angles a CD and B DC we have angle A D C is equal to angle BCD given and CD is equal to CD common