Math Problem Statement

Draw the rotation of pentagon ABCDE clockwise 180° about point C. Label the corresponding points in the image with A', B', C', D', and E'.

Solution

The task asks to rotate the pentagon ABCDEABCDE by 180° clockwise about point CC, and label the corresponding points A,B,D,EA', B', D', E'.

Steps to Rotate the Pentagon 180°:

  1. Locate point C: Since the rotation is centered around point CC, this point will remain fixed during the rotation.

  2. Determine new positions of other points:

    • For a 180° rotation, each point will end up on the opposite side of CC, at the same distance from CC as before but in the opposite direction.
  3. Mapping each vertex:

    • Point A: Count the number of units AA is from CC. It is 3 units right and 2 units up. After the 180° rotation, AA' will be 3 units left and 2 units down from CC.
    • Point B: BB is 2 units right and 2 units up from CC. After the rotation, BB' will be 2 units left and 2 units down from CC.
    • Point D: DD is 2 units left and 1 unit down from CC. After the rotation, DD' will be 2 units right and 1 unit up from CC.
    • Point E: EE is 1 unit left and 2 units down from CC. After the rotation, EE' will be 1 unit right and 2 units up from CC.

Final Positions:

  • A=(3,2)A' = (-3, -2)
  • B=(2,2)B' = (-2, -2)
  • D=(2,1)D' = (2, 1)
  • E=(1,2)E' = (1, 2)

Would you like me to provide more details on any step?

Here are 5 follow-up questions to expand on this:

  1. What is the general rule for rotating a point 180° around another point?
  2. How can we apply matrix transformations for such rotations?
  3. How do clockwise and counterclockwise rotations differ geometrically?
  4. Can you explain the symmetry observed in a 180° rotation?
  5. What other geometric properties remain unchanged during a rotation?

Tip: When rotating, always ensure to measure distances carefully from the center of rotation for accurate placement.

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Math Problem Analysis

Mathematical Concepts

Geometry
Rotations
Coordinate Transformations

Formulas

Rotation formula for 180°: (x', y') = (-x, -y) relative to the center of rotation
Point transformation relative to a fixed point

Theorems

Rotation Theorem: A rotation of 180° about a point moves each point to its reflection across the center.

Suitable Grade Level

Grades 6-8