Math Problem Statement

Write the coordinates of the vertices after a rotation 180° counterclockwise around the origin.

Solution

You provided an image that asks for the coordinates of the vertices after a 180° counterclockwise rotation around the origin. Here's how we can solve this step by step.

Current coordinates of the vertices:

Looking at the grid, the original coordinates are:

  • M(3,4)M (3, 4)
  • L(7,4)L (7, 4)
  • J(3,0)J (3, 0)
  • K(7,0)K (7, 0)

Rule for a 180° counterclockwise rotation:

For a 180° rotation around the origin, the rule is: (x,y)(x,y)(x, y) \rightarrow (-x, -y) This means we change the sign of both the x and y coordinates.

Applying the rule:

  1. For M(3,4)M (3, 4), applying the rule: M(3,4)M' (-3, -4)
  2. For L(7,4)L (7, 4), applying the rule: L(7,4)L' (-7, -4)
  3. For J(3,0)J (3, 0), applying the rule: J(3,0)J' (-3, 0)
  4. For K(7,0)K (7, 0), applying the rule: K(7,0)K' (-7, 0)

Final coordinates after the 180° rotation:

  • M(3,4)M' (-3, -4)
  • L(7,4)L' (-7, -4)
  • J(3,0)J' (-3, 0)
  • K(7,0)K' (-7, 0)

Would you like a deeper explanation or have any other questions? Here are some related questions for further practice:

  1. What is the rule for a 90° clockwise rotation around the origin?
  2. How would the coordinates change for a 270° counterclockwise rotation?
  3. What would happen to the shape if it were reflected across the x-axis instead of rotated?
  4. How does the area of the figure change after a rotation or reflection?
  5. What are the coordinates after a 360° rotation, and why?

Tip: When performing rotations, make sure to apply the rules consistently to all points, and check how the figure moves in relation to the origin.

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Math Problem Analysis

Mathematical Concepts

Geometry
Coordinate Plane
Rotations

Formulas

(x, y) → (-x, -y) for 180° rotation

Theorems

Rotation Theorem

Suitable Grade Level

Grade 8-10