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Published byBrook Caldwell Modified over 9 years ago
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Perform Congruence Transformations
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Transformations: when you move or change a geometric figure in some way to produce a new figure. Image is what the new figure is called. Translation: is when we move every point on the figure, the same distance and direction. Reflection: is when we use a line of reflection to create a mirror image of the original figure. Rotation: Turns a figure about a fixed point called the center of rotation Congruence Transformations: changing the position of a figure without changing its size or shape. There are 3 types of transformations.
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Coordinate Notation for a translation: (x,y) (x+a, y+b) Which shows that each point (x,y) of the blue figure is translated horizontally a units and vertically b units a b x y
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Multiply the y coordinate by -1 (x,y) (x,-y) Multiply the x coordinate by -1 (x,y) (-x,y) Reflection in the x-axis Reflection in the y-axis y x y x (x,y) (x,-y) (-x,y) (x,y)
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90 clockwise Rotation 60 counterclockwise rotation y y xx
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Figure ABCD has the vertices A(-4, 3), B(-2, 4), C(-1, 1), and D(-3, 1). Sketch ABCD and its image after the translation (x, y) (x+5, y-2).
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Figure WXYZ has the vertices W(-1, 2), X(2, 3), Y(5, 0), and Z(1, -1). Sketch WXYZ and its image after the translation (x, y) (x-1, y+3).
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Use coordinate notation to describe the translation. 5 units right, 3 units up 7 units left, 4 units down
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