Calculation: Draw a line segment EF which is parallel to PA and passes through the point making angle x and name the angles y and z. y=45° (Alternate interior angles) z=30° (Alternate interior angles) x+y+z=360° (Complete angle) ⇒x=360°–z–y ⇒x=360°–30°–45°=360°–75° ∴ x is 285°