How do you describe the properties of the diagonals of a parallelogram.
Adding more information about the diagonals in a Parallelogram:
In a parallelogram, diagonally-opposite angles are equal. Diagonals drawn which divide these agles into two angles in each corner create opposite equal angles: the inside corner angles made between a diagonal and any one side = the angles made at the other end of the diagonal and the opposing equivalent side.
Diagonals create triangles: twice as many triangles as there are diagonals. These triangles are congruent (equal in all 3 sides and 3 angles) if one of them is flipped or inverted and compared with the triangle directly opposite it.
Two diagonals bisect each other: a crossing diagonal divides the diagonal it crosses exactly in half.