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Answer:
yes
yes
no
May be it helps
Answer:
(A. angel 1=angel apq(v.o.a)
so angel apq=angel 2(alternate angel of || line is=)
so angel 1=angel 2
(B. angel 2=angel cqr(v.o.a)
so angel cqr=angel 3(alternate angel of || line is=)
so angel 2 =angel 3
(C. angel apq=angel 3
because angel 3=angel 2 (from q.(B.)
angel 2 =angel apq so angel apq=angel 3
so AB||EF (alternate angel is equal)