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2023 Math Kangaroo

Problem 12

Problem 12 · 2023 Math Kangaroo Stretch
Spatial & Visual Reasoning tiling-tessellationsymmetrycomposition

Elvis has 6 triangles, all with the same pattern. Which picture can he make with them?

Figure for Math Kangaroo 2023 Problem 12
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Answer: A
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Hint 1 of 3
All six triangles look exactly the same, with the same little pattern.
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Hint 2 of 3
So the right picture is made of six copies of that one triangle and nothing else.
Still stuck? Show hint 3 →
Hint 3 of 3
Check each picture: cross out any that use a triangle with a different pattern.
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Approach: the picture must use six copies of the same triangle
  1. Elvis only has 6 triangles, and they all have the same pattern.
  2. So the picture he can build is made of six matching triangles, all looking alike.
  3. Look at each option and cross out the ones using a different or mismatched triangle; the picture left is option A.
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