Question

2.3: move card sort
your teacher will give you a set of cards. sort the cards into categories according to the type of move they show. be prepared to describe each category and why it is different from the others. you can explore the applets below to see the ways the images move.
drag the red point. explore how the image changes. (red font not in textbook)
geogebra applet (links to an external site.)links to an external site. geogebra applet (links to an external site.)links to an external site.
translations: cards -
rotations: cards -
reflections: cards -

Explanation:

Step1: Identify translation

Translation is a rigid - motion where every point of the figure moves the same distance in the same direction. Cards showing figures that have just shifted position without rotation or flipping are translations.

Step2: Identify rotation

Rotation is a transformation where a figure is turned around a fixed point. Cards with figures that have changed orientation around a center point are rotations.

Step3: Identify reflection

Reflection is a transformation where a figure is flipped over a line of reflection. Cards with figures that are mirror - images of each other with respect to a line are reflections.

Answer:

Translations: Cards 1, 7, 10
Rotations: Cards 4, 6, 11
Reflections: Cards 2, 3, 5, 8, 9, 12