1, the preparation material is square, first fold the material in half.
2. Symmetric patterns are mainly folded parts, and several folds determine how much the symmetry axis is folded.
3, so 60% off is good.
4. Draw a pattern and mark the cut part.
5. Cut the diagonal.
6, marked with the axis of symmetry, a * * * four.
7. Cut the axisymmetric figure.
Axisymmetric figures include circles, squares, isosceles triangles and ellipses.
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.
Judgment method:
1. If two figures are symmetrical about a straight line, then the symmetry axis is the perpendicular to the line segment connected by any pair of corresponding points.
2. Similarly, the symmetry axis of an axisymmetric figure is the median vertical line of a line segment connected by any pair of corresponding points.
3. The distance between the point on the vertical line of the line segment and the two endpoints of the line segment is equal.
4. Symmetry axis is the set of points with equal distance to both ends of the line segment.