Math Problem Statement
What is the image of the point left parenthesis, minus, 7, comma, 4, right parenthesis(−7,4) after a rotation of 90, degrees90∘ counterclockwise about the origin?
Solution
To find the image of the point after a counterclockwise rotation about the origin, we use the rotation transformation rule for counterclockwise:
For the point :
Applying the transformation:
The image of the point after a counterclockwise rotation about the origin is:
Would you like further details or a graphical explanation?
Related Questions:
- What is the result of a rotation for the same point?
- How would a clockwise rotation change the coordinates?
- Can you generalize the rule for a counterclockwise rotation?
- What would the coordinates be if reflected across the x-axis instead of rotated?
- How does the transformation change if the center of rotation is not the origin?
Tip:
Always visualize rotations with reference to quadrants to avoid errors.
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Math Problem Analysis
Mathematical Concepts
Geometry
Rotations
Coordinate Transformations
Formulas
(x, y) → (-y, x) for 90° counterclockwise rotation about the origin
Theorems
Rotation Transformation Rules
Suitable Grade Level
Grades 8-10
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