Math Problem Statement

Write the coordinates of the vertices after a rotation 90° counterclockwise around the origin.

Solution

The problem asks to find the coordinates of the vertices after a 90° counterclockwise rotation around the origin.

The original coordinates of the vertices from the graph are:

  • J(6,6)J(-6, 6)
  • K(2,4)K(2, 4)
  • L(2,10)L(2, 10)

For a 90° counterclockwise rotation about the origin, the transformation rule is: (x,y)(y,x)(x, y) \rightarrow (-y, x)

Now applying this rule to each vertex:

  1. For J(6,6)J(-6, 6): (6,6)(6,6)(-6, 6) \rightarrow (-6, -6)

  2. For K(2,4)K(2, 4): (2,4)(4,2)(2, 4) \rightarrow (-4, 2)

  3. For L(2,10)L(2, 10): (2,10)(10,2)(2, 10) \rightarrow (-10, 2)

Thus, the new coordinates after the 90° counterclockwise rotation are:

  • J(6,6)J'(-6, -6)
  • K(4,2)K'(-4, 2)
  • L(10,2)L'(-10, 2)

Would you like further details or have any other questions?

Here are 5 related questions to expand on this topic:

  1. What is the general rule for rotating points 180° or 270° around the origin?
  2. How do you perform a rotation clockwise instead of counterclockwise?
  3. How would you calculate the rotation around a point other than the origin?
  4. What are the applications of rotational transformations in geometry?
  5. How can you verify the accuracy of the rotated points on a graph?

Tip: Always double-check the sign changes and axis swapping when applying rotation rules.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Rotations
Transformations

Formulas

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

Theorems

Rotation transformation about the origin

Suitable Grade Level

Grades 8-10