Question

In parallelogram ABCD, ACBO. Is ABCD a rectangle?
No
O Yes
O Cannot be determined

Answer 1

Answer: Yes
Because ABCD is a parallelogram, its opposite sides are equal. (matching angles of congruent triangles). DCB = 90o . Hence ABCD is rectangle, because it is a parallelogram with one right angle.

Answer 2

Answer: B. YesStep-by-step explanation:We have been given that in parallelogram ABCD, D is a right angle. We are asked to determine whether the given parallelogram is rectangle or not.Let us recall parallelogram properties.Opposite angles of parallelogram are equal.Consecutive angles of parallelogram are supplementary.Since D is a right angle, so its opposite angle will be right angle as well and consecutive angles of angle D will be right angles as well.Therefore, the parallelogram ABCD is a rectangle and option B is the correct choice.

Explanation: