whaat is the meaning of  congruent trapezium ?????

A congruent trapezium may be defined as the one having all its sides and angles equal to the corresponding sides and angles of another trapezium.

For example, in the figure given below, PQRS is a congruent trapezium corresponding to trapezium ABCD in which

AB = PQ, BC = QR, CD = RS and AD = PS.

Also, ∠A = ∠P, ∠B = ∠Q, ∠C = ∠R and ∠D =∠S