First, you can determine that because the parallelogram has two pairs of equal sides, it also has two pairs of equal angles. Also, a parallelogram’s interior angles add up to 360°. So since two different angle measures are given, their angles must add up to 180° (360°/2). So then you can add both of the expressions of those two angles and put them into an equation and isolate x.
Its irrational because the square root of 127 is a decimal that goes on and on and cannot be represented as a fraction. So it is irrational. Hope this helps.
