Question

QRS is a parallelogram in which angle R is equal to 90 degree prove that pqrs is a rectangle

Answer 1

a parallelogram pqrs in which one of the angle is 90 degree then the other line also will be parallel and it is also 90 degree so when the two parallel lines add 90 degree meet other two Parallel Lines then it is rectangle I am screwed and we know that the parallelogram in which all the angle are 90 degree and parallel to each other