Proficient

The student can:
· show two figures are congruent after a sequence of rigid motions (translations, reflections, rotations).
· use the definition of congruence as a test to see if two figures are congruent (if and only if they have the same shape and size).

A student finds two triangles on two different pieces of patty paper. He places them on the desk to compare them. He slides and then turns the paper so that the two triangles on are on top of each other and then he notices that he needs to flip one of the papers so that they will land exactly on top of each other. The student concludes that they are copies of each other. Mathematically, what did this procedure prove about the triangles? 
Progressing

There are no major errors or omissions regarding the simpler details and processes as the student can:
· recognize and recall terminology to answer questions.
· use composite transformations to map one figure onto another.
· recognize the effects of rigid motion on orientation and location of a figure.

1. A rigid motion is the same as:
A) A mapping
B) A transformation
C) An Isometric transformation
D) A proportional expansion
2. Congruence can be found through isometric transformations because they preserve key characteristics of the shape. Which of the following is NOT one of the characteristics that an isometry preserves?
A)Angle size
B) Location on the plane
C)Distance between points
D) Collinearity of points
3. K(x,y)      > (x,y)could represent a transformation that could establish congruence. T or F
