In figure, Diagonals AC and BD of a quadrilateral ABCD intersect at O such that OB=OD. If AB=CD, show that: (a) ar(∆AOB)=ar(∆DOC) (b) ar(∆ACB)=ar(∆DCB) (c) DA is parallel to CB or ABCD is a parallelogram.

In figure, Diagonals AC and BD of a quadrilateral ABCD intersect at O such that OB=OD. If AB=CD, show that: (a) ar( $∆$ AOB)=ar( $∆$ DOC) (b) ar( $∆$ ACB)=ar( $∆$ DCB) (c) DA is parallel to CB or ABCD is a parallelogram.

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.