Describe a transformation that would `undo' each of the following:

Question

(a) A translation determined by slide arrow from A to B; (b) A clockwise rotation of 75o with center O; (c) A counter clockwise rotation of 45o with center A;

(d) A glide refection that is the composition of a refection in the line L ` and a translation that takes A to B

where AB ll L

(e) A refection in line L

(f) A dilation centered at A and having a scale factor of 2.

Answer 1

a) a translation determined by a slide arrow from B to A

b) a counterclockwise rotation of 75 degrees with center O

c) a clockwise rotation of 45 degrees with center A

d) a glide reflection that is the composition of a translation from B to A and a reflection to the original side of the line L

e) a reflection to the original side of the line L

f) A dilation centered at A and having a scale factor of 1/2