Math Problem Statement

Rectangle WXYZ with vertices W(-8, -4), X(-2, -1), Y(0, -5), Z(-6, -8); 270° counterclockwise rotation about the origin. Triangle RST with vertices R(2, 6), S(6, 7), T(8, 1); 180° rotation about the origin.

Solution

The problem involves two geometric transformations — a 270° counterclockwise rotation and a 180° rotation about the origin. Let's solve the transformations for both shapes.

Problem 1: Rectangle WXYZ

  • Vertices: W(-8, -4), X(-2, -1), Y(0, -5), Z(-6, -8)
  • Transformation: 270° counterclockwise rotation about the origin

To perform a 270° counterclockwise rotation on any point (x, y), the transformation formula is: (x,y)(y,x)(x, y) \to (y, -x) Using this formula for each point:

  1. W(-8, -4): W=(4,8)W' = (-4, 8)

  2. X(-2, -1): X=(1,2)X' = (-1, 2)

  3. Y(0, -5): Y=(5,0)Y' = (-5, 0)

  4. Z(-6, -8): Z=(8,6)Z' = (-8, 6)

Problem 2: Triangle RST

  • Vertices: R(2, 6), S(6, 7), T(8, 1)
  • Transformation: 180° rotation about the origin

To perform a 180° rotation on any point (x, y), the transformation formula is: (x,y)(x,y)(x, y) \to (-x, -y) Using this formula for each point:

  1. R(2, 6): R=(2,6)R' = (-2, -6)

  2. S(6, 7): S=(6,7)S' = (-6, -7)

  3. T(8, 1): T=(8,1)T' = (-8, -1)

Summary of Coordinates:

  • For the rectangle WXYZ after the 270° rotation:

    • W'(-4, 8)
    • X'(-1, 2)
    • Y'(-5, 0)
    • Z'(-8, 6)
  • For the triangle RST after the 180° rotation:

    • R'(-2, -6)
    • S'(-6, -7)
    • T'(-8, -1)

Would you like further explanations or clarifications on these transformations? Feel free to ask any questions!

Related Questions:

  1. What are other rotation formulas for different angles (90°, 180°, 360°)?
  2. How would the coordinates change for a reflection instead of a rotation?
  3. What is the effect of rotating a shape by 270° clockwise instead of counterclockwise?
  4. Can the transformations be visualized using graph paper or coordinate geometry tools?
  5. How do these transformations affect the area or shape of a polygon?

Tip: Always remember the specific transformation rules for rotations around the origin to quickly solve problems involving geometric transformations.

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Math Problem Analysis

Mathematical Concepts

Geometry
Coordinate Geometry
Rotations

Formulas

(x, y) → (y, -x) for 270° counterclockwise rotation
(x, y) → (-x, -y) for 180° rotation

Theorems

Rotation Theorems about the origin

Suitable Grade Level

Grades 7-9