Math Problem Statement

What is the image of the point left parenthesis, 5, comma, minus, 3, right parenthesis(5,−3) after a rotation of 90, degrees90 ∘ counterclockwise about the origin?

Solution

To find the image of the point (5,3)(5, -3) after a 90-degree counterclockwise rotation about the origin, we can apply the following transformation rule for rotating a point (x,y)(x, y) by 90 degrees counterclockwise:

(x,y)(y,x)(x, y) \rightarrow (-y, x)

Given the point (5,3)(5, -3):

  1. The x-coordinate becomes the negative of the y-coordinate: (3)=3-(-3) = 3
  2. The y-coordinate becomes the x-coordinate: 55

Thus, the image of the point (5,3)(5, -3) after the 90-degree counterclockwise rotation is:

(3,5)(3, 5)

Would you like more details or further explanation?

Here are 5 related questions for practice:

  1. What is the image of the point (4,7)(-4, 7) after a 90-degree clockwise rotation?
  2. How do you find the image of a point after a 180-degree rotation?
  3. What happens to the point (x,y)(x, y) after a 270-degree counterclockwise rotation?
  4. Can you derive the transformation for a 45-degree rotation about the origin?
  5. What is the image of the point (2,6)(2, -6) after a reflection over the x-axis?

Tip: For rotations, always remember to treat the point's coordinates according to the angle's direction and magnitude (clockwise or counterclockwise).

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Rotations
Transformations

Formulas

Rotation Formula: (x, y) → (-y, x) for 90° counterclockwise rotation

Theorems

Rotation Theorem about the origin

Suitable Grade Level

Grades 8-10