2. As shown in the figure, find out that the midpoint plane of the material is divided into three parts, one part is folded up and the other part is folded back.

3. As shown in the figure, flatten the material and fold it in half.

4. As a picture, the pattern of an axis of symmetry; Mark the points to be cut.

5. Cut off the parts marked with diagonal lines.

6. This is a round window grillage with many symmetry axes.

Axisymmetric figure, a mathematical term, is defined as a figure folded along a straight line in a plane, and the parts on both sides of the straight line can completely overlap.

A straight line is called the axis of symmetry, and the axis of symmetry is represented by a dotted line. At this time, we also say that this figure is symmetrical about this line. Such as circle, square, isosceles triangle, equilateral triangle, isosceles trapezoid, etc.

Axisymmetric graphic attribute

1. The symmetry axis is a straight line.

2. In an axisymmetric figure, the distance between the corresponding points on both sides of the axis of symmetry is equal.

3. Axisymmetric graphics, folded in half along the axis of symmetry, and completely overlapped left and right.

4. If two figures are symmetrical about a straight line, then this straight line is the line segment whose symmetry axis bisects the symmetry point vertically.

5. Graphic symmetry.