Naming the Moves

Student Summary

Here are the moves we have learned about so far:

  • A translation slides a figure without turning it. Every point in the figure goes the same distance in the same direction. For example, Figure A was translated down and to the left, as shown by the arrows. Figure B is a translation of Figure A.
    Two figures, one labelled A, and its translation, labelled B.
  • A rotation turns a figure about a point, called the center of the rotation. Every point on the figure goes in a circle around the center and makes the same angle. The rotation can be clockwise, going in the same direction as the hands of a clock, or counterclockwise, going in the other direction. For example, Figure A was rotated 4545^\circ clockwise around its bottom vertex. Figure C is a rotation of Figure A.
    Two figures, one labelled A, and its rotation, labelled C.
  • A reflection places points on the opposite side of a reflection line. The mirror image is a backwards copy of the original figure. The reflection line shows where the mirror should stand. For example, Figure A was reflected across the dotted line. Figure D is a reflection of Figure A.
    Two figures, one labelled A, and its reflection, labelled D

Visual / Anchor Chart

Standards

Building On
4.MD.5

4.MD.C.5

Addressing
8.G.1

8.G.A.1

8.G.1

8.G.A.1

8.G.1

8.G.A.1