Junior high school mathematics is in urgent need of help. How to rotate the shape around 0 point 180 degrees? In addition, what about the symmetry of the original point in the plane rectangular coordinate system? Thank you. A point (x, y) rotates around the origin. The coordinates of 180 are (-x, -y).

Therefore, if the equation of a graph is known and it is required to rotate 180 around the origin, it is only necessary to replace x and y in the original equation with -x and -y respectively.

The coordinates of the point where the point (x, y) is symmetrical with respect to the point (a, b) are (2a-x, 2b-y).