Diagonals AC and BD of a quadrilateral ABCD intersect at O in such a way that area of triangle AOD is equal to the area of triangle BOC. Prove that ABCD is a trapezium.

Mixed-up sentence exercise

Put the parts in order to form a sentence. When you think your answer is correct, click on "Check" to check your answer. If you get stuck, click on "Hint" to find out the next correct part.