Transformations Formative #2

1. What transformation does NOT preserve congruence?

• dilation

• rotation

• reflection

• translation

2. Describe the rotation.

• 90 degrees counterclockwise

• 180 degrees

• 90 degrees clockwise

• 270 degrees counterclockwise

3. Which answer shows a reflection across the x-axis?

• d

• c

• b

• a

4. What is the algebraic notation of a figure translated 9 units right and 3 units down?

• (x, y) --> (x - 9, y + 3)

• (x, y) --> (x + 9, y - 3)

• (x, y) --> (x + 3, y - 9)

• (x, y) --> (9x, 3y)

5. What is the algebraic notation of a figure translated 6 units right and 5 units up?

• (x, y) --> (x - 6, y + 5)

• (x, y) --> (x + 6, y + 5)

• (x, y) --> (x + 5, y - 6)

• (x, y) --> (6x, 5y)

6. Determine how to translate triangle ABC to triangle A'B'C'.

• right two, down five

• right two, down 9

• left two, down 9

• left two, up 9

7. A triangle has vertices A(0,0), B(8,0), C(3,-2). Find the coordinates of the triangle after a dilation with a scale factor of 4. The dilation is (X,Y) --- (4x,4y)

• A(3,3), B(4,4), C(-3,-4)

• A(-4,8), B(6.5,8), C(7,7)

• A(0,0), B(32,0), C(12,-8)

8. What is the scale factor? Remember: image/preimage

• 2

• 3

• 1/3

• 1/2

9. If the scale factor is less than one, the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

10. If the scale factor is greater than one, the new figure will be

• a reduction

• an enlargement

• a scale

• not proportional