Axisymmetry: An overview of the basics of middle school math!
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13.1 Axisymmetry.
13.2 Draw axisymmetric figures.
13.3 Isosceles triangle.
13.4 Shortest path problem.
The extension of axial symmetry in middle school mathematics is as follows: axis symmetry is one of the important concepts in mathematical geometry, which refers to the fact that after a plane figure is folded along a straight line, the two sides of the straight line can coincide with each other, such a figure is called axisymmetric figure, and this straight line is called the axis of symmetry. To learn axisymmetry, you must master the following basics: 1Definition and properties of axisymmetric figures. An axisymmetric figure is a flat figure that can be completely overlapped when folded along the axis of symmetry. This type of graph has some special properties, such as the corresponding points on both sides of the axis of symmetry are at the same distance from the axis of symmetry, and there are corresponding points on the straight line perpendicular to the axis of symmetry.
2) Definition and properties of the axis of symmetry. The axis of symmetry is a straight line in which the two parts of the axisymmetric figure are folded in half. On the axis of symmetry, the distance between the corresponding points on both sides is equal, and the straight line is perpendicular to the axis of symmetry.
3) Classification and judgment of axisymmetric figures. Axisymmetric shapes can be divided into basic geometry, combined shapes, and other types. For each type of shape, it is necessary to master its judgment method, such as triangles, rectangles, diamonds and other basic geometric shapes are axisymmetric shapes.
In short, axial symmetry in junior high school mathematics is one of the important concepts of mathematical geometry, which requires us to master its definition, properties, classification, judgment and application. By learning and mastering this knowledge, we can better understand and apply the concept of axisymmetry, improve mathematical literacy and problem-solving skills.