The provided image contains text about parallelograms and a diagram. Please analyze the content and respond in a JSON format.

Content Analysis:

• The text states that if a parallelogram has a circumscribed circle, then all its angles are 90°, meaning it is a rectangle.
• It also mentions that the center of the circle coincides with the intersection point of the diagonals of this rectangle.
• The image displays a quadrilateral labeled A, B, C, D, resembling a parallelogram, with angles denoted by Greek letters alpha (α) and beta (β).