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SREWSNA KROWEMOH
1. (-y, x) 10. A’(-1, 1) B’(-5, 1) C’(-5, 4)
2. (-x, -y)14. A’(-3, -3) B’(-3, -1) C’(1, -1)
3. D 18. G
4. E 22. J
5. P 26. A
8. BC
CAN YOU HANDLE THIS!?!?!
Triangle ABC has coordinates A(2, 1), B(-1, -1), and C(0, -3).
Perform the following transformations:
1. T(-3,-5) to get A’B’C’
2. Reflect A’B’C’ over the y = -x line to get A’’B’’C’’
3. Rotate A’’B’’C’’ 90 degrees to get A’’’B’’’C’’’
Symmetry
Math 2 - Lesson 63Mr. Lopez
Symmetry
• A figure has symmetry if there is an isometry that maps the figure onto itself.
• There are 4 kinds of symmetry Vertical Line Symmetry Horizontal Line Symmetry Point Symmetry Rotational Symmetry
Vertical Line Symmetry
• A figure has vertical line symmetry if you draw a vertical line down the middle of the figure and the left side is mapped onto the right side of the figure at every point.
• Ex:
M
Horizontal Line Symmetry
• A figure has horizontal line symmetry if you draw a horizontal line across the middle of the figure and the top is mapped onto the bottom of the figure at every point.
• Ex:
D
Point Symmetry
• A figure has point symmetry if you rotate the object 180 degrees and it maps onto the original image.
• Ex:
N
Rotational Symmetry
• A figure has rotational symmetry if you rotate the image any rotation and it maps onto the original image.
• Ex
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