Western Normal University Edition First Grade Mathematics Volume 1
People's Education Press First Grade Mathematics Volume 1
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People's Education Press Third Grade Mathematics Volume 1
People's Education Press Second Grade Mathematics Volume 1
Beijing Normal University Edition Fifth Grade Mathematics Volume 1
Hebei Education Edition Third Grade Mathematics Volume 1
Hebei Education Edition Seventh Grade Mathematics Volume 2
Beijing Normal University Edition Seventh Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 1
People's Education High School Mathematics Edition B Compulsory Course 2
Beijing Normal University Edition Eighth Grade Mathematics Volume 1
Qingdao Edition Seventh Grade Mathematics Volume 2
Jiangsu Education Edition Fourth Grade Mathematics Volume 1
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People's Education Press First Grade Mathematics Volume 2
!["Rotation of Graphics" PPT Courseware 2](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/d66e378b-8f29-4c25-86d1-d9fecee0d906.webp)
Category | Format | Size |
---|---|---|
Qingdao Edition Eighth Grade Mathematics Volume 2 | pptx | 6 MB |
Description
"Rotation of Graphics" PPT Courseware 2
rotation definition
In a plane, a figure is rotated by a certain angle around a fixed point in a certain direction (counterclockwise or clockwise). This transformation is called the rotation of the figure. This fixed point is called the center of rotation, and this angle is called the rotation angle. After the rotation of the figure, The position is determined by the center of rotation, direction of rotation and angle of rotation.
properties of rotation
A figure and the figure obtained by rotating it
The distance between the corresponding point and the center of rotation is equal;
The angles formed by the two sets of corresponding points with the line connecting the rotation centers are equal to each other.
As shown in the figure, △AOB is obtained by rotating 450 degrees counterclockwise around point O.
The corresponding point of point B is point _____
The corresponding line segment of line segment OB is line segment ______
The corresponding segment of line segment AB is line segment ______
The corresponding angle of ∠A is ______
The corresponding angle of ∠B is ______
The center of rotation is point______
The angle of rotation is ______
practise
1. As shown in the figure: P is a point within the equilateral △ABC. Rotate △ABP in different directions to obtain △BQC and △ACR.
(1) Indicate the center of rotation, direction of rotation and angle of rotation?
(2) Can △ACR be obtained directly by rotating △BQC?
Simple rotation drawing
1. As shown in the figure, after △ABC is rotated around point C, the corresponding point of vertex A is point D. Try to determine the position of the corresponding point of vertex B and the rotated triangle.
Then △DEC is the desired operation.
2. As shown in the figure: Draw the corresponding triangle of △ABC rotated 120° clockwise around point C.
Link to high school entrance examination
1. (2013•Hengyang) As shown in the figure, in the right angle △OAB, ∠AOB=30°, rotate △OAB 100° counterclockwise around point O to get △OA1B1, ∠A1OB=____.
2. (2013 Nanchang) As shown in the figure, rotate △ABC counterclockwise around point A by a certain angle to get △ADE. If ∠CAE=65°, ∠E=70°, and AD⊥BC, the degree of ∠BAC is ()
3. (2013•Tieling) As shown in the figure, in △ABC, AB=2, BC=3.6, ∠B=60°, rotate △ABC clockwise around point A at a certain angle to get △ADE, when the corresponding point B When point D happens to fall on the edge of BC, the length of CD is ____.
4. (2013·Jilin Province) As shown in the figure, rotate Rt�ABC 40° counterclockwise around point A to get Rt�AB′C′. Point C′ falls exactly on side AB and connects BB′, then ∠BB′ C′=_____ degree.
Keywords: rotation teaching courseware of graphics, Qingdao edition eighth grade mathematics volume 2 mathematics PPT courseware download, eighth grade mathematics slide courseware download, rotation of graphics PPT courseware download, .PPT format;
For more information about the "Rotation of Graphics" PPT courseware, please click the Rotation of Graphics ppt tab.
"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: 2024-09-08
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