It makes us think there is new information or a follow-up question and we spend time opening the thread. Simply click on the Thank button at the bottom left-hand corner of any post you find helpful. I agree with Mike.
Symmetry comes from a Greek word meaning 'to measure together' and is widely used in the study of geometry. Mathematically, symmetry means that one shape becomes exactly like another when you move it in some way: turn, flip or slide.
Point Symmetry. Point symmetry occurs when every part of an object has a matching part that is the same distance from the origin on a coordinate plane, but is in the opposite direction. Point symmetry is often called origin symmetry because the point is frequently the origin on the coordinate plane.