Question

Diagonals PR and QS of quadrilateral PQRS intersect each other at A.show that ar(triangle PSA)*ar(triangle QAR)=ar(triangle PAQ)*ar(triangle SAR)
for class 9th chapter areas of parallelograms and triangles

Answer 1

in quadrilateral all sides are congruent and opposite sides are parallel so each diagonal of a parallelogram are separated into two congruent triangles ,

Answer 2

each diagonal of a parallelogram are separated into two congruent triangles