Question

if a straight line falling on two straight makes the interiors angles on the same side of it , whose sum is 120 degree, then the two straight line, if produced indefinitely, meet on the same side on which the sum of angles is

Answer 1

If a straight line falling on two straight lines makes the interior angles on the
same side together less than two right angles, the two straight lines, if produced
indefinitely, meet on that side on which the angles are together less than two
right angles.

So From the give Postulate

Ans is 120 degrees