Yes
Parallelograms (including rectangles and squares)
The diagonals are equal in length and bisect each other forming vertical opposte equal angles
A square has two diagonals that bisect each other at 90 degrees
A rhombus or a square. In rectangles (unequal side length) this does not occur.
No, a rectangle's diagonals do not bisect opposite angles.
The diagonals of a square (which always bisect each other) are the same length.
Not for every parallelogram. Only for a rhombus (diamond) or square will the diagonals bisect the opposite angles they connect, and diagonals are perpendicular. In rectangles, the diagonals do not bisect the angles and are notperpendicular, but they do bisect each other.
Yes
Bisect: Yes At 90 degrees: No
Parallelograms (including rectangles and squares)
The diagonals are equal in length and bisect each other forming vertical opposte equal angles
A square has two diagonals that bisect each other at 90 degrees
Only a square and a rhombus will have all its diagonals bisecting vertices. In other shapes some - but not all - diagonals can bisect vertices.
In general they are not; they are perpendicular only if the rectangle is also a sqare. However, the diagonals of a retangle have another attribute: They are of equal length and bisect each other.
A rhombus or a square. In rectangles (unequal side length) this does not occur.
not all