Rotation: Every part of an object rotates around the same point. For example, the hands of a clock keep turning around the center point. Rotation can be divided into clockwise rotation and counterclockwise selection. Rotating phenomena: such as rotating flying chair, merry-go-round, fan blade rotation, motor operation, wind power generation, clock movement, ferris wheel rotation, etc.
Translation: In a plane, all points on the graph move the same distance in a straight line. When translating, the direction and size of the figure have not changed, but the position has changed, and there can be no straight track up, down, left and right.
Axisymmetric figure: a figure whose two sides are completely coincident after being folded in half along the axis of symmetry. For example: circle, square, isosceles triangle, etc.