# Does Composition with Dilation and Rotation matter?

Author:
Karen Rowe

## Composition using Rotation and Dilation

Part A: Rotation then Dilation 1. Use the rotation tool to complete a r(+90,C ), then D3. step 1: select point A step 2 select point C, which is the center point for the rotation step 3: this is a positive rotation, so it is counterclockwise. Repeat for B and the segment. For segment A'B', point A', & point B', change the color to red. 2. Use the input line below the graph, copy the following Dilate(A', 3), then select the new point and label A'. Repeat for point B. Use the segment tool for A"B". For segment A''B'', point A'', & point B'', change the color to green.

## Part B: Dilate then Rotate

1. Use the input line below the graph, copy the following Dilate(A, 3), then select the new point and label A'. Repeat for point B. Use the segment tool for A'B'. For segment A'B', point A', & point B', change the color to red. 2. Use the input line below the graph, copy the following Rotate(A, +90). Repeat for point B. Use the segment tool for A"B". For segment A''B'', point A'', & point B'', change the color to green.

## Composition using Rotate with Dilation

Does the order matter? Why? Think of the Coordinate Rules from the Transformation Notes.