Dilation Scale Factor Congruency

What ratio would I use for the side 5 and its corresponding side?

• 15/5 = 3

• 21/5

• 18/5

• 7/5

Polygon A and B are similar. Give the scale factor of figure A to B.

• 4:1

• 1:4

• 4

• 2:4

Two figures are _______ if the second can be obtained from the first by a sequence of transformations or dilations.

• congruent

• similar

• scale

• corresponding

Choose the correct similarity transformation.

• Dilation using scale factor of 5/2 followed by a rotation 90 CCW

• Dilation with a scale factor of 5/2 followed by a y-axis reflection

• Dilation with scales factor of 5/2 followed by 90 CCW rotation and then a translation 3 units to the left and 3 units down

• 90 CCW rotation  followed by 5/2 dilation

Select ALL that apply.

• Dilation using 2 as scale factor followed by y-axis reflection.

• X axis reflection followed by dilation using scale factor of 2

• Y axis reflection followed by dilation using scale factor of 2

• 90 CCW rotation followed by dilation using scale factor of 2

Select the rule for the similarity transformation shown.

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Triangle EFG has vertices (-8,-4), (-8,0) and (4,0). Its image is E’F’G’ with vertices (3,6), (0,6) and (0,3) respectively. Which similarity transformation shows the two are similar?

• Dilation using scale factor of 3/4 , followed by y-axis reflection, then a 90 CCW rotation

• Dilation using scale factor of 4/3 , followed by y-axis reflection, then a 270 CCW rotation

• Dilation using scale factor of 3/4 , followed by 180 rotation, then y-axis rotation

• Dilation using scale factor of 4/3 , followed by 180 rotation, then y-axis rotation

Select the correct congruency transformation.

• X-axis reflection, then translation 10 to the right

• 180 rotation, then y-axis reflection

• Y-axis reflection, then x-axis reflection

• Reflection over line y=-x

(x,y) --> (kx, ky)

• Rotation

• Reflection

• Dilation

• Translation

If your scale factor is between 0 and 1, what happens?

• Reduction 

• Enlargement

• Rotation

• Reflection