Rotations on the Plane
Create a triangle with vertices (4,5), (4,0), and (1,0).
1. Rotate the triangle 90 degrees about the origin.
2. Rotate the triangle 180 degrees about the origin.
3. Are the images in (1) and (2) congruent? Explain.
4. What is a rotation?
5. What point does a figure rotate about?