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Rotate ppt-Xiangjiao version eight courseware
Xiangjiao Version 8 Shang 3.1 "Rotation" ppt (1) What are the common characteristics of the rotation phenomenon in the above scenario? (2) Has the shape, size and position of the hands and swings of the clock changed during the rotation? In the plane, a figure F is rotated by an angle α around a fixed point in a certain direction to obtain a figure F ′. Such a figure transformation is called rotation, this fixed point is called the center of rotation, and the angle of rotation α is called the rotation angle. The graph F at the original position is called the original image, and the graph F 'at the new position is called the image of the graph F under rotation, and each point P on the graph F corresponds to its image point P' under rotation is called under rotation. point