<PQR = 127; Since the sum of all angles in a triangle is 180 degrees,
<SPQ+<PSQ = 125
180-125 = 55 (<PQS = 55)
Since triangle QRS is isosceles, 2 of the angles are equal, and if <QRS = 36 then:
180-36 = 144 / 2 = 72 (<RQS = 72)
Now just add the two angles (shown in parenthesis) to find <PQR, 127
