Question

3. For two parallel lines sum of interior angles on the same side of a transversal, is
(a) 90°
(b) 1209
(c) 80°
(d) 180°​

Answer 1

Answer:

When a transversal intersects two lines, the two lines are parallel if and only if interior angles on the same side of the transversal and exterior angles on the same side of the transversal are supplementary (sum to 180).

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Answer 2

sorry I am poor in math....