Problem:
1. Rotate (turn) triangle ABC counterclockwise 90۫ about point R.
2. Describe the relationship between each point on the original polygon and its image point under the rotation.[1]
Answer:
1.
2. The distance from a point to R is the same as the distance from the image point to R.
The angle formed by a point, its image, and point R is 90۫.
[1] Connected Mathematics Project (2004). Kaleidoscopes, Hubcaps, and Mirrors Pearson Prentice Hall