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1. |
 has vertices A(3, 7), B(-2, 1), and C(4, -1). Suppose the triangle is rotated 180° to form  . What are the coordinates of B'? |
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A. |
(-2, -1) |
B. |
(2, -1) |
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C. |
(1, -2) |
D. |
(2, 1) |
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Hint |
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2. |
If two lines intersect at an angle of 23°, what is the angle of rotation? |
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A. |
16.5° |
B. |
67° |
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C. |
32° |
D. |
46° |
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Hint |
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3. |
If two lines intersect so that the angle of rotation equals 98°, what is the angle formed by the intersecting lines? |
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A. |
98° |
B. |
82° |
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C. |
196° |
D. |
49° |
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Hint |
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4. |
Triangle QRS with coordinates Q (3, 2), R (-2, 1) and S (1, -3) is rotated 180° on the coordinate plane. What are the coordinates of triangle Q'R'S'? |
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A. |
Q'(-3, -2), R'(-2, -1), S'(-1, -3) |
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B. |
Q'(-2, -3), R'(2, -1), S'(-1, 3) |
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C. |
Q'(-3, -2), R'(2, -1), S'(-1, 3) |
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D. |
Q'(-2, -3), R'(-1, 2), S'(-1, 3) |
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Hint |
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5. |
Which is not a true statement about rotations? |
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A. |
A rotation maintains collinearity. |
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B. |
A rotation maintains angle measure. |
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C. |
A rotation maintains distance measure. |
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D. |
A rotation maintains orientation. |
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Hint |
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