Question

hi pls find the value of y

Answer 1

here,
in ∆PQR
PQR=90°
PRQ+PRS=180°
PRQ=180°-120°
PRQ=60°
So,
PQR+PRQ+RPQ=180°
90°+60°+y=180°
y=180°-150°
y=30°

Answer 2

angle PRQ =180-120 =60
Then y = 180 -90 -60 =30