Question

the parallelogram in which one angle is 90 degreea is a​

Answer 1

Answer:

rectangle

From the above theorem, it can be derived that if one angle of a parallelogram is equal to 90 degrees, then all four angles are equal to 90 degrees. Therefore, it will become a rectangle. If one angle is a 90 degrees, then all four angles 90 degrees: Since, the adjacent sides are supplementary.

Answer 2

Answer:

since opposite angles of a parallelogram are always equal .∠A+∠B+∠C+∠D=360°

∠A =∠B=∠C=∠D=90°

∴ It is square