A movement of a figure in a plane.

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A movement of a figure in a plane. Transformations Transformation: Image: Translation: Reflection: Rotation: A movement of a figure in a plane. The new figure formed by a transformation. In the textbook, the original figure will be BLUE and the image will be RED. SLIDE FLIP TURN Each point of a figure is moved the same distance in the same direction. A figure is reflected in a line called the line of reflection, creating a mirror image of the figure. A figure is rotated through a given angle and in a given direction about a fixed point called the center of rotation.

4. Draw a quadrilateral JKLM with vertices J(-5, 3), K(-4, 5), L(-3, 3), and M(-4, 1). Then find the coordinates of the vertices of the image after the translation (x, y)  (x + 6 , y – 2 ) and draw the image. Original Image J(-5, 3)  K(-4, 5)  L(-3, 3)  M(-4, 1)  Identify the transformation. If it is a reflection, identify the line of reflection. If it is a rotation, give the angle and direction of rotation. 5. 6. 7.

center of rotation angle of rotation clockwise counterclockwise The ____________________________for all rotations in the textbook will be the origin. Rays drawn from the center of rotation through corresponding points on an original figure and its image form an angle called the _____________________________. Rotations are described by the angle and direction of rotation, either _________________ or _________________________. NOTE: a complete circle (rotation) is Half of a rotation is: Begin with the light figure, and rotate to the dark figure. Estimate the angle and direction of rotation. angle of rotation clockwise counterclockwise

Rotations in Coordinate Geometry: Coordinate notation for specific rotations. Rotational Symmetry 5. Since you can rotate an equilateral triangle three times within the 360 degree turn, divide 360 by 3 to find the angle of rotation.