Lesson 2
Naming the Moves
Problem 1
Each of the six cards shows a shape.
![6 panels each showing the one of three different figures in different positions and orientations.](https://cms-im.s3.amazonaws.com/FgwTRVKgxqEpiyEPbW1sULLt?response-content-disposition=inline%3B%20filename%3D%228-8.1.A.PP.Image.0005.png%22%3B%20filename%2A%3DUTF-8%27%278-8.1.A.PP.Image.0005.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240726%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240726T234523Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=ee1f834a99dc8b7c10c95efee3eca7744c53f12a4b1d90ad6078c0403f114e5e)
- Which pair of cards shows a shape and its image after a rotation?
- Which pair of cards shows a shape and its image after a reflection?
Solution
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Problem 2
The five frames show a shape's different positions.
![5 panels showing the same figure in different positions and orientations.](https://cms-im.s3.amazonaws.com/xHJ88MokH9cUEYscp4QtjQui?response-content-disposition=inline%3B%20filename%3D%228-8.1.A.PP.Image.0004.png%22%3B%20filename%2A%3DUTF-8%27%278-8.1.A.PP.Image.0004.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240726%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240726T234523Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=2af58580d03967bcc11a013bdd87bface44b20c1f0ad13f1217659f866d436bd)
Describe how the shape moves to get from its position in each frame to the next.
Solution
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Problem 3
The rectangle seen in Frame 1 is rotated to a new position, seen in Frame 2.
![A figure of rectangular Frame 1 and Frame 2, each with a rectangle.](https://cms-im.s3.amazonaws.com/PEKMuaBbfRHBnaaF1Q44gVUo?response-content-disposition=inline%3B%20filename%3D%228-8.1.A1.newPP.03.png%22%3B%20filename%2A%3DUTF-8%27%278-8.1.A1.newPP.03.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240726%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240726T234523Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=6130a3966353fee5808df8c0b480cd7b1ffdc8d88bd74063bf06c1494f43b4a7)
Select all the ways the rectangle could have been rotated to get from Frame 1 to Frame 2.
40 degrees clockwise
40 degrees counterclockwise
90 degrees clockwise
90 degrees counterclockwise
140 degrees clockwise
140 degrees counterclockwise
Solution
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(From Unit 1, Lesson 1.)