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Exploring Points of Concurrency - 2019

Manipulate the vertices of the triangle to investigate the location of the centers of a triangle.

1. Which two of the four centers are not always in the interior of the triangle?

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  • A
  • B
  • C
  • D

2. What is true about the triangle when two of the centers are not inside the triangle?

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  • A
  • B
  • C

3. When all four centers are in the interior of the triangle, which is closest to the largest angle?

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  • A
  • B
  • C
  • D

4. Adjust the triangle above so that all four points of concurrency are located at the same point. What is true about triangle ABC when this happens?

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  • A
  • B
  • C

5. Adjust this applet so that all of the points of concurrency are collinear on a horizontal line. What is true about the triangle in this situation? (hint: you will probably need to move more than one vertex)

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  • A
  • B
  • C