Which of the following transformations appears to be a translation of the graph of ?
Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
0. Review of College Algebra
Transformations
Multiple Choice
Which of the following sets of transformations will map rectangle onto itself?
A
Only a rotation of about the center
B
A rotation of about the center and reflections over both diagonals
C
A rotation of about the center and reflections over the lines through the midpoints of opposite sides
D
Only reflections over the diagonals
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Verified step by step guidance1
Step 1: Understand the symmetry properties of a rectangle. A rectangle has two lines of symmetry through the midpoints of opposite sides, but generally does not have symmetry over its diagonals unless it is a square.
Step 2: Consider rotations about the center of the rectangle. A rotation of 180\(\degree\) about the center maps the rectangle onto itself because opposite vertices swap places, preserving the shape.
Step 3: Analyze a 90\(\degree\) rotation about the center. For a rectangle (not a square), a 90\(\degree\) rotation will not map the rectangle onto itself because the side lengths are different and the shape orientation changes.
Step 4: Examine reflections over the diagonals. Since the diagonals of a rectangle are not lines of symmetry (unless it is a square), reflecting over the diagonals will not map the rectangle onto itself.
Step 5: Examine reflections over lines through the midpoints of opposite sides. These lines are axes of symmetry for a rectangle, so reflecting over these lines will map the rectangle onto itself.
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