Question

if two parallel lines are intersected by transversal then prove that the bisector of two interior angles are parallel

Answer 1

It will be angle 3 +angle 4 = angle 9 +angle 10
and we know that if the corresponding angle are equal than the lines are parallel

Answer 2

acc to que
angle 5 =angle 6 (exterior angles)
angle 1=2=3=4
therefore
angle 1 +angle 6 =angle 4 +angle 5
(exterior angles)
therefore the bisectors are parallel

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