Math Problem Statement

Select all the statements that are true about A'B'C'D', given that parallelogram ABCD is rotated 270° counterclockwise about the origin.

Solution

The first image represents the parallelogram ABCDABCD being rotated 270270^\circ counterclockwise about the origin, resulting in ABCDA'B'C'D'. The second image provides statements to verify if they are true about the transformed parallelogram.

Analysis of the Statements:

  1. ABA'B' is parallel to DCD'C':

    • True. Parallelism is preserved under rotation since it is a rigid motion.
  2. ADA'D' is the same length as ADAD:

    • True. Distances between points remain unchanged under rotation.
  3. A\angle A has the same measure as A\angle A':

    • True. Angles within a figure remain unchanged under rigid transformations.
  4. AA' has the same coordinates as AA:

    • False. The coordinates of AA change after a rotation of 270270^\circ.

Conclusion:

The first three statements are true, and the last one is false.

Would you like to explore further explanations or coordinate transformations in detail? Let me know!


Relative Questions:

  1. What are the coordinates of AA', BB', CC', and DD' after the rotation?
  2. How is a 270270^\circ counterclockwise rotation mathematically defined in terms of coordinates?
  3. How does rigid motion affect the properties of geometric shapes?
  4. Can other transformations (e.g., reflection or translation) also preserve angle measures and side lengths?
  5. How would a 9090^\circ clockwise rotation differ from a 270270^\circ counterclockwise rotation in terms of final coordinates?

Tip:

When performing rotations, always use the rotation formula:
(x,y)(y,x)(x, y) \rightarrow (-y, x) for 270270^\circ counterclockwise.

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Math Problem Analysis

Mathematical Concepts

Transformations
Rotations
Properties of parallelograms
Preservation of geometric properties under rigid motions

Formulas

Rotation formula for 270° counterclockwise: (x, y) → (y, -x)

Theorems

Rigid motions preserve lengths and angles.
Parallelism is preserved under rotations.

Suitable Grade Level

Grades 8-10