Big Ideas Geometry

What is the scale factor of the dilation from A to B ?

• 1/4

• 1/2

• 1

• 2

What is the scale factor of the dilation from A to B ?

• 2

• 1

• 1/2

• 1/3

Which of the statements is true about the graphed triangles from the preimage to the image?

• They are similar, because the image can be obtained by dilating the preimage about the origin with a scale factor of 2.

• They are similar, because the image can be obtained by dilating the preimage about the origin with a scale factor of 1/2.

• They are not similar, because the image can not be obtained by dilating the preimage about the origin with a scale factor of 2.

• They are not similar, because the image can not be obtained by dilating the preimage about the origin with a scale factor of 1/2.

What is the rule for the dilation pictured below?

• (x, y) → (½x, ½y)

• (x, y) → (x + 2, y + 2)

• (x, y) → (2x, 2y)

• (x, y) → (2x, 3y)

Name the series of transformations that maps ABC onto DEF

• reflect over x then translate left 6 up 1

• reflect over y then translate down 6 left 1

• translate right 6 down 1, then reflect over x

• rotate 90 clockwise then reflect over y

Reflect Point C over the y-axis:

• (-3, 2)

• (3,2)

• (-2,3)

• (3,0)

Which rule would result in a translation of 2 units left and 3 units up?

• (x, y) → (2x, 3y)

• (x, y) → (x - 2, y + 3)

• (x, y) → (-x, -y)

• (x, y) → (x + 2, y - 3)

The rule for rotation of 270 degrees counterclockwise is

(x, y) --> _

• (y, -x)

• (-y, x)

• (x, -y)

• (-x, y)

The rule for rotation of 270 degrees is  
(x, y) --> _

• (y, x)

• (-y, x)

• (y, -x)

• (x, -y)

What would the new point be if you rotated the point (3,-5) 90° counterclockwise?

• a. (-3,-5)

• b. (-5,-3)

• c. (5,3)