関連ワード:
are the adjacent angles of a rectangle equal are the opposite angles of a rectangle equal are the opposite angles of a quadrilateral equal are the adjacent angles of a cyclic quadrilateral equal are adjacent angles of a quadrilateral equal are the opposite angles of a quadrilateral always equal are opposite angles of a quadrilateral equal to 180 opposite angles of a rectangle are equal or not opposite angles of a rectangle are equal true or false are all angles of a rectangle equal
