"Central Symmetry" Rotation PPT Courseware 2

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"Central Symmetry" Rotation PPT Courseware 2

1. What is the relationship between the following two graphics?

(1)What is axial symmetry?

(2) What is the name of straight line l?

(3) Point out the symmetry points in the figure?

2. As shown in the figure, rotate △ABC 100° counterclockwise around point C and draw the rotated figure.

(1)What is rotation?

(2) How to draw rotating graphics?

Definition of central symmetry:

Rotate a figure 180° around a certain point. If it can coincide with another figure, then the two figures are said to be symmetrical or centrally symmetrical about the point.

Example 1, as shown in the figure, the quadrilateral ABCD is rotated 180° around point C. Please make the rotated pattern and answer the questions:

(1) Are these two images centrally symmetrical? If so, what is the center of symmetry? If not, please explain why.

What is the relationship between central symmetry and rotation?

(2) If it is centrally symmetrical, then what are the symmetrical points of point A, point B, point C, and point D about the center?

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For more information about the "Central Symmetry of Rotation" PPT courseware, please click the Rotation ppt Centrosymmetry ppt tag.

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Update Time: 2024-11-21

This template belongs to Mathematics courseware People's Education Press Ninth Grade Mathematics Volume 1 industry PPT template

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