The vertices of a parallelogram are A(x₁, y₁), B(x2, 2), (X3. Y3), and DX4Y4). Which of the following must be true if parallelogram ABCD is proven to be a rectangle?

The vertices of a parallelogram are Ax y Bx2 2 X3 Y3 and DX4Y4 Which of the following must be true if parallelogram ABCD is proven to be a rectangle class=