Question

Help me please
Please solve the question step by step
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Answer 1

AB =AC

so

< B=<C(opposite angles to equal sides)

<EAC=<B+<C (exterior angle property)

<EAC=<C+<C

<EAC=2<C

<EAC/2=<C ................ FIRST EQUATION

<EAC/2=<DAC

<DAC=<C (Substituting value)

<DAC=<C (Alternate interior)

therefore we can say that AD is parallel to BC