Question

friends please help me

Answer 1

I)-two pairs
a and d, c and b
as their sum is 180.


ii)-ang.qpt is equal to ang pqt
(as the sides opp. to them are equal and tge triangle tpq is an isosceles)

and also ang qpt=ang rst
so ang qpt=ang rst

and hence there are equal which mean it is alternate ang and the lines are parallel


iii)-ang MNP=(180-70)/2=110/2=55

as ang MNP and ang qps are equal each 55°.

hence they are alternate angle and thus the lines are parallel