Dilations vs Rigid Transformation

Identify the transformation

• Dilation

• Translation

• Reflection

Does the image show a Dilation? If yes, did the image enlarge, reduce or none of the above?

• Yes, enlarge

• Yes, reduce

• No

Dilation is a type of ...

• rigid transformation

• non-rigid transformation

a transformation that ​changes the size (enlargement or reduction) of a figure is called a ​ ​ ​ (a)  

• dilation

• rotation

• reflection

• translation

If the scale factor is greater than 1, the dilation is (a)  

• an enlargement

• a rotation

• a translation

• a reduction

Which of the following is NOT a rigid transformation?

• reflection

• dilation

• rotation

• translation

Match the following

• Non-Rigid Transformations

• The origin is often used as the center of dilation. If you are dilating a figure centered at the origin, you can multiply the coordinates of the points in the preimage by the scale factor to determine the points in the image

• Center of origin

• The factor by which every length in

  the pre-image is increased or decreased when

  you make a scaled copy

• Dilation

• Dilation

• Scale Factor

• The process of resizing an object by a certain scale factor

• Rigid Transformations

• Translation, Reflection, Rotation

Which of the following is NOT A RIGID TRANSFORMATION because it doesn't preserve size?

• translation

• rotation

• dilation

• reflection

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½

• ¼

• 4

• 2