Math Problem Statement
What is the image of the point left parenthesis, minus, 2, comma, minus, 7, right parenthesis(−2,−7) after a rotation of 90, degrees90 ∘ counterclockwise about the origin?
Solution
To determine the image of the point after a 90-degree counterclockwise rotation about the origin, we can apply the following transformation rule:
Here’s the process:
- The original point is .
- After applying the rule:
- ,
- New coordinates: =
Thus, the image of the point after a 90-degree counterclockwise rotation about the origin is (7, -2).
Would you like more details or have any questions?
Here are 5 related questions:
- What would be the image of after a 90-degree counterclockwise rotation?
- How do you rotate a point 180 degrees about the origin?
- What is the rule for a 90-degree clockwise rotation about the origin?
- How do you find the new coordinates of a point after a 270-degree counterclockwise rotation?
- What happens when you reflect a point across the x-axis?
Tip: For a 90-degree counterclockwise rotation, you simply switch the coordinates and change the sign of the original y-coordinate.
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Math Problem Analysis
Mathematical Concepts
Coordinate Geometry
Rotations in the Cartesian Plane
Formulas
(x, y) → (-y, x) for 90-degree counterclockwise rotation
Theorems
Rotation transformation rule for 90 degrees counterclockwise
Suitable Grade Level
Grades 9-10
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