If A' is the symmetric of A with respect to M, then M is the midpoint of the line segment AA'.
Calculate the symmetric point of A = (7, 4) with the midpoint M = (3, −11).
Calculate the symmetric point of A = (4, −2) for midpoint M = (2, 6).
Find the symmetric point A' for the point A = (3, 2), with the line of symmetry: r ≡ 2x + y − 12 = 0.
The line r ≡ x + 2y − 9 = 0 is the perpendicular bisector of the line segment AB whose endpoint A has the coordinates (2, 1). Find the coordinates of the other endpoint.