Easy chapter. To rest a bit. |
The image of the point A under the translation by the vector is the point A' below :
The image of the point A under the rotation around the center O and of angle x is the point A' such as OA = OA' and
It is a symmetry with respect to a line.
It's symmetry with respect to a point. The points AOA' are in a line and OA' = OA.
The image of the point A under the homothecy of center O and ratio k is the point A' such that
. On the drawing below,
k = -3.