In the axisymmetric graphic plane, the graphic is folded along a straight line, and the parts on both sides of the straight line can completely overlap.
Life function
1, for beauty. For example, Tiananmen Square is symmetrical.
2. Keep balance. Like the wings of an airplane.
3, the needs of special work. For example, the five-pointed star, paper cutting.
Extended data:
In practical differences, axisymmetric graphics should be folded like origami, and what can be overlapped is axisymmetric graphics; The central symmetrical figure only needs to be inverted to see if there is any change. What hasn't changed is the figure with central symmetry. At present, the common figures in primary school textbooks are classified as follows: the figures that are both symmetrical and central are: rectangle, square, circle, diamond and so on.
Only axisymmetric figures are: angle, pentagram, isosceles triangle, equilateral triangle, isosceles trapezoid, etc.
Only the figure with central symmetry is a parallelogram.
Figures that are neither axisymmetric nor centrosymmetric include equilateral triangles, isosceles trapezoid, etc.
A graph is both symmetric and central. There must be two or more axes of symmetry.