Question

which of the following is not a property of a parallelogram? select one: a. all angles are right angles. b. opposite sides have equal measures. c. opposite angles have equal measures. d. opposite sides are parallel.

Explanation:

A parallelogram has opposite sides parallel and equal, and opposite angles equal. Only rectangles (a special - type of parallelogram) have all angles as right - angles. In a general parallelogram, angles are not all right - angles.

Answer:

A. All angles are right angles.