Answer:
Step-by-step explanation:
angle SRT = 180 - 70 = 110
thus angle QSR = 180 - 20 - 110 = 50
BY Angle sum property
angle PQS = 180 - 85 - 50 = 180 - 135 = 45
<PTR+<RTS=180 LINEAR PAIR
<PTR=180-20=160°
IN QUADRILATERAL PQRT
<P+<Q+<R+<T=360 SUM OF INTERIOR ANGLE OF QUADRILATERAL IS 360
85+<Q+70+160=360
<Q=360-315=45°
angle PQS=45°
