Question -
Answer -
(i) It can be observedthat parallelogram PQRS and ABRS lie on the same base SR
and also, these lie inbetween the same parallel lines SR and PB.
∴Area (PQRS) = Area (ABRS) … (1)
(ii) Consider ΔAXS andparallelogram ABRS.
As these lie on the samebase and are between the same parallel lines AS and BR,
∴ Area (ΔAXS) = 
Area (ABRS) … (2)From equations (1) and(2), we obtain
Area(ΔAXS) = Area (PQRS)