S1:y2=2x‌‌S2:x2+y2=4x P(2,2) is common point on S1&S2 T1 is tangent to S1 at P‌‌⇒T1:y⋅2=x+2 ⇒T1:x−2y+2=0 T2 is tangent to S2 at P⇒T2:x⋅2+y⋅2=2(x+2) ⇒T2:y=2 L3:x+y+2=0 is third line
‌PQ=a=√20 ‌QR=b=√8 ‌RP=c=6 ‌‌ Area ‌(∆PQR)=∆=‌