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旋转变换是指在平面内,将一个图形绕某一定点,按顺时针(或逆时针)方向旋转一个角度,得到另一个图形,这样的图形变换叫旋转变换,简称旋转.这个点叫旋转中心,这个角叫旋转角.旋转变换有以下性质:①变换后的图形与原图形全等;②对应点到旋转中心的距离相等;③对应线段的所在直线的交角等于旋转角.旋转在几何解题中有着广泛的应用,它往
Rotation is the transformation of the plane, a figure around a fixed point, clockwise (or counterclockwise) direction of an angle, get another graphic, this transformation called the rotation transform, referred to as rotation. This point is called the rotation center , This corner is called the rotation angle. The rotation transformation has the following properties: ① The transformed image is congruent with the original image; ② The distance between the corresponding point and the rotation center is equal; ③ The angle of intersection of the corresponding line segment is equal to the rotation angle. The title has a wide range of applications, it goes