Quadrilateral PQRS is a parallelogram. If adjacent angles are congruent, which statement must be true?
A. PQRS is a square.
B. PQRS is a rectangle.
C. PQRS is an isosceles trapezoid.
D. PQRS is a rhombus
2 answers
ur answer is B
all angles 90 degrees, adjacent sides not necessarily of same length, so B