1. Chapter 9 - Transformations
Warmup today – take 8 minutes
Remove all graded papers from folders
If you took the test yesterday – do the final self-evaluation on the green form (last column) based
Everyone – on the back of the green form (or a separate piece of paper if you don’t have one) … respond to the following:
Are you happy with your current grade? If not, what are you currently doing to address it?

2. Chapter 9 – Key Terminology
Transformation – a “mapping” that results in a change in position, shape or size of the object.
Isometry or rigid motion – a transformation that maintains size and shape.
Preimage – this is the object before a transformation has been applied.
Image – this is the object after the transformation has been applied.
Translation – a Transformation that changes only the position of an object by shifting it up/down/left/right

3. Translations
Correct Notation = T< horizontal, vertical> {object}
T<1,3> ABCD
This “shifts” the quadrilateral ABCD right 1 and up 3.
T<-2,-5> ABCD
This “shifts” the quadrilateral ABCD left 2 and down 5.
If the Pre-Image is labeled ABCD, the corresponding vertices in the Image are named A’B’C’D’