| Category | Format | Size |
|---|---|---|
| People's Education Press Ninth Grade Mathematics Volume 1 | pptx | 6 MB |
"Rotation of Graphics" Rotation PPT Courseware 2
Description
"Rotation of Graphics" Rotation PPT Courseware 2
rotating concept
In a plane, a figure is rotated by an angle around a fixed point in a certain direction. Such figure transformation is called rotation (Circumrotation).
This fixed point is called the center of rotation, and the angle of rotation is called the angle of rotation.
Three elements of rotation:
Rotation center, rotation direction, rotation angle.
Properties of rotation:
1. During the rotation of the graphics, what has changed? What has not changed?
2. Connect the corresponding points A, D and the rotation center O respectively, and measure the line segments OA and OD. What is their relationship? Find any pair of corresponding points and measure the line segments connecting them to the rotation center. What can you find? law?
3. Measure the degree of ∠AOD, then find any pairs of corresponding points, and measure the degrees of the line segments connecting the corresponding points and the center of rotation. What rules can you find?
Practice in class
1. Which of the following phenomena belong to rotation ( )
① The groundwater level decreases year by year; ② The movement of the conveyor belt; ③ The rotation of the steering wheel; ④ The rotation of the faucet switch; ⑤ The movement of the pendulum; ⑥ The movement of the swing.
A.2 B.3 C.4 D.5
2. Which of the following statements is correct ( )
A. Rotate to change the shape and size of the graphic
B. Translation changes the position of the graphic
C. Graphics can be rotated a certain distance in a certain direction
D. The graphics obtained by translation must also be obtained by rotation
Keywords: Rotation courseware, rotation courseware of graphics, New People's Education Edition ninth grade mathematics PPT courseware, ninth grade mathematics slide courseware download, rotation PPT courseware download, rotation of graphics PPT courseware download, .ppt format
For more information about the "Rotation of Rotated Figures" PPT courseware, please click the Rotate ppt label of Rotated ppt graphics.
"Rotation of Plane Figures" PPT Courseware 3:
"Rotation of Plane Figures" PPT Courseware 3 Think about it. What common characteristics do the rotation phenomena in the above scenario have? During the rotation of the hands and swings of the clock, their shapes and sizes...
"Rotation of Plane Figures" PPT courseware 2:
"Rotation of Plane Figures" PPT Courseware 2 Observation and Thinking 1. Observe how the hands of the clock in Figure 1 move from OA to OB position? 2. Observe the rotation process of the hands of the clock in Figure 2. Please tell how the blades of the windmill move from OM turns to the ON position? 3. As shown in the figure, the triangle AOB is...
"Rotation of Plane Figures" PPT courseware:
"Rotation of Plane Figures" PPT Courseware Understanding Rotation Rotation of Figures Point A revolves around point __, toward the direction of ____, and rotates __ degrees to point B. In a plane, a figure is rotated by an angle around a fixed point in a certain direction. Such figure motion is called...
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Update Time: 2024-07-02
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