| Category | Format | Size |
|---|---|---|
| Beijing Normal University seventh grade mathematics volume 2 | pptx | 6 MB |
"Axisymmetric Phenomenon" Axisymmetric PPT Courseware 3
Description
"Axisymmetric Phenomenon" Axisymmetric PPT Courseware 3
Can you quickly cut out a shape so that the left and right sides completely overlap? You can discuss it, or you can see how other students cut it.
Thinking: What are the characteristics of these graphics you cut out?
If a figure is folded along a straight line, and the parts on both sides of the straight line can overlap each other, the figure is called an axially symmetric figure (symmetric figure), and this straight line is its axis of symmetry.
Axisymmetric graphics Two graphics are axially symmetrical
The difference between one graph and two graphs
Contact 1. After folding along a straight line, the parts on both sides of the straight line can overlap with each other.
2. All have an axis of symmetry (at least one)
3. If an axially symmetrical figure is divided into two figures along the axis of symmetry, then the two figures are symmetrical about this line; conversely, if two axially symmetrical figures are regarded as one figure, then the figure is an axially symmetrical figure. .
Thinking: Are two axially symmetric figures congruent? If an axisymmetric figure is divided into two figures along the axis of symmetry, are the two figures congruent? Are these two shapes symmetrical?
think about it
1. Are two axially symmetric figures necessarily congruent? Are two congruent figures necessarily symmetrical?
2. What is the connection and difference between an axially symmetrical figure and the axially symmetrical formation of two figures?
Connection: An axially symmetrical figure is divided into two figures along the symmetry axis to form an axially symmetrical figure; when the two axially symmetrical figures are regarded as a whole, it is an axially symmetrical figure.
Difference: an axially symmetrical figure refers to a figure with a special shape; axial symmetry between two figures means that the two figures have a special positional relationship.
summary:
What did you gain from studying this lesson?
1. The concept of axisymmetric graphics
2. The concept of two figures forming axial symmetry
3. The difference and connection between the two
4. Find the axis of symmetry and corresponding points of the axially symmetrical figure
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For more information about the "Axisymmetric Phenomenon of Axisymmetry" PPT courseware, please click on the "Axisymmetric ppt Axisymmetric Phenomenon ppt" tag.
"Axisymmetric Phenomenon" Axisymmetric PPT courseware 4:
"Axisymmetric Phenomenon" Axisymmetric PPT Courseware 4 Students' existing basic knowledge base: Students have a preliminary understanding of axisymmetric figures in elementary school, but their understanding is only at the perceptual level and they lack understanding of specific related concepts. Experience Fundamentals: Nature and...
"Axisymmetric Phenomenon" Axisymmetric PPT Courseware 2:
"Axisymmetric Phenomenon" Axial Symmetry PPT Courseware 2 Think about it (1) Can you name objects with symmetrical characteristics in life and communicate with your peers. (2) Can you fold the above picture in half along a straight line so that the parts on both sides of the straight line completely overlap? (3) Place a piece of paper against...
"Axisymmetric Phenomenon" Axisymmetric PPT courseware:
"Axisymmetric Phenomenon" Axisymmetric PPT Courseware Facing these beautiful pictures in life, do you strongly feel that beauty is all around us? What kind of beauty is this? Could you please share your thoughts? Symmetry is an idea through which people pursue throughout their lives and...
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Update Time: 2024-07-06
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