Question

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Answer 1

Given AB //CD and t is a transversal

To prove angle 4+angle 5=180

and angle 6+ angle 3=180

In fig.

l//m and t is a transversal

1=5(corres.angles)

1+4=180(lp)

5+4=180(as1=4)

Similarly we can prove that

6+3=180