In an Isosceles trapezium, the opposite angles are complimentary.
False
ABCD is an isosceles trapezium in which AD = BC and AB is parallel to DC.
∠A+∠D=180∘
∠A=∠B (Trapezium is isosceles)
⇒∠B+∠D=180∘
Similarly ∠A+∠C=180∘
∴ The given statement is false as the opposite angles are supplementary.