Answer:
[tex]Given:-[/tex] Δ ABC
[tex]AC~is~exteuded ~through ~C~to ~D[/tex]
[tex]BC~is ~drawn ~to ~AC[/tex]
[tex]Using ~Triangles~Exterior~angle~theorm,[/tex]
1) =∠3+∠4 and ∠4=∠5+∠6
∠7=∠3+∠2
So, only D) m∠7=m∠3+m∠2 is correct
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