Math Problem Statement
figures D and E are congruent. Figure D, with coordinates (1,2),(1,3),(3,5), and (4,1), is rotated 90 degrees clockwise about the origin and than reflected over the y-axis to transform onto figure E. what are the coordinates of figure E?
Solution
To find the coordinates of figure E, we need to apply two transformations to figure D: a 90-degree clockwise rotation about the origin, followed by a reflection over the y-axis.
Let's go step by step:
Step 1: 90-degree clockwise rotation about the origin
When a point is rotated 90 degrees clockwise about the origin, its new coordinates become .
Let’s apply this transformation to each of the points of figure D:
Step 2: Reflection over the y-axis
When a point is reflected over the y-axis, its new coordinates become .
Let’s apply this transformation to the points we obtained from the rotation:
Final coordinates of figure E:
Thus, the coordinates of figure E are:
Would you like more details or have any questions?
Here are 5 related questions:
- What are the coordinates if figure D were reflected over the x-axis instead of the y-axis?
- How would the coordinates change if the rotation was counterclockwise instead of clockwise?
- Can a translation be combined with rotation and reflection to form a new transformation?
- How do you determine if two figures are congruent through transformations?
- What happens if you apply two reflections to a figure—one over the x-axis and one over the y-axis?
Tip: When rotating figures, it's helpful to visualize how the points move quadrant by quadrant to avoid confusion with sign changes.
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Math Problem Analysis
Mathematical Concepts
Coordinate Geometry
Transformations
Rotations
Reflections
Formulas
90-degree clockwise rotation: (x, y) → (y, -x)
Reflection over y-axis: (x, y) → (-x, y)
Theorems
Congruence through rigid transformations
Suitable Grade Level
Grades 8-10
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