If the diagonals AC, BD of a quadrilateral ABCD, intersect at O and separate the quadrilateral into four triangles of equal area, show that quadrilateral 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.