Answer:
A. The diagonals in a parallelogram.
Step-by-step explanation:
We are asked to choose which of the given choices are not perpendicular.
A. The diagonals in a parallelogram.
We know that diagonals of parallelogram bisect each other, they are not necessarily perpendicular. For example rectangle is parallelogram, but its diagonals are not perpendicular.
Therefore, option A is the correct choice.
B. The diagonals in a kite.
We know that the diagonals of a kite are perpendicular to of each other, therefore, option B is not a correct choice.
C. The diagonals in a rhombus.
We know that the diagonals of a rhombus are perpendicular to of each other, therefore, option C is not a correct choice.
D. The adjacent sides in a rectangle.
We know that all angle of rectangle are right angles. This means the adjacent sides are perpendicular, therefore, option D is not a correct choice.
