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ANSWER:
It has been rotated about 180 degrees about the origin.
If it had been rotated about 360 then it has been the same.
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The triangle ABC has been rotated 180 degrees counterclockwise about the origin

How to determine the angle of rotation?

From the figure, we have the following highlights

  • Triangle ABC is in the second quadrant
  • Triangle A'B'C' is in the fourth quadrant

The difference between the quadrants is:

d = 4 - 2

Evaluate

d = 2

Convert to degrees

Angle = 2 * 90

Evaluate

Angle = 180

Hence, the triangle ABC has been rotated 180 degrees counterclockwise about the origin

Read more about rotation at:

https://brainly.com/question/4289712

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