Math Problem Statement

The figure at right is composed of ten identical triangles, each of which has three congruent sides and each angle measures 60°. Solve the transformations involving rotations and mappings provided in the problem.

Solution

The image shows a question about transformations of a geometric figure composed of identical equilateral triangles, each with three congruent sides and 60° angles. The problem involves understanding rotations about different points in the figure.

Let's go through each part of the question:

  1. A) Rotating 60° clockwise about EE maps BB onto FF.

    • Rotating 60° clockwise about point EE, which is the center of the adjacent equilateral triangles, brings point BB to FF.
  2. B) Rotating 60° clockwise about HH maps BB onto KK.

    • Rotating 60° clockwise about HH, which is at the bottom-left of the figure, moves point BB to KK.
  3. C) Rotating 60° counterclockwise about KK maps CC onto BB.

    • A 60° counterclockwise rotation about KK moves CC to BB, as observed geometrically.
  4. D) Rotating 120° clockwise about FF maps CGCG onto GEGE.

    • A 120° clockwise rotation about FF moves segment CGCG (right diagonal of the triangle) onto GEGE.
  5. E) Rotating 120° clockwise about BB maps CGCG onto FGFG.

    • A 120° clockwise rotation about BB moves CGCG to FGFG, maintaining alignment with the geometry.
  6. F) Rotating 60° clockwise about DD maps DEA\triangle DEA onto DEH\triangle DEH.

    • A 60° clockwise rotation about DD shifts DEA\triangle DEA (leftmost triangle) to DEH\triangle DEH below it.
  7. G) Rotating 180° clockwise about FF maps BEF\triangle BEF onto CGE\triangle CGE.

    • A 180° rotation about FF moves BEF\triangle BEF to CGE\triangle CGE, as FF remains the fixed center.

Do you want me to provide a detailed geometric explanation for any part or help with further questions?


Here are five related questions to expand your understanding:

  1. What happens if we rotate 90° instead of 60° in similar diagrams?
  2. How do rotations affect the orientation of specific line segments in equilateral triangles?
  3. Can you use reflections instead of rotations to map one segment to another?
  4. How can we verify rotations using coordinate transformations?
  5. What is the difference between clockwise and counterclockwise rotations for the same angle?

Tip: Always identify the center of rotation and the direction (clockwise or counterclockwise) to simplify the problem.

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Math Problem Analysis

Mathematical Concepts

Geometry
Rotational Symmetry
Transformations

Formulas

Rotation Formula: R(theta)

Theorems

Properties of Equilateral Triangles
Rotation Transformations

Suitable Grade Level

Grades 8-10