TEKS 7.5 Attributes of Similarity

Which of the following best explains why ΔAB and ΔA'B' are similar?

• Sides AB and A'B' are congruent.

• Corresponding sides are congruent.

• Corresponding sides are proportional.

The __________ is the ratio of a length of the new figure to the corresponding length on the original figure.

• reduction

• enlargement

• scale factor

• center of dilation

• The figure was translated 2.6 units to the right and 2.6 units up.
  

• The sides of the image were reduced by a scale factor of 2.6.

• The sides of the image were enlarged by a scale factor of 2.6.

• The image is a reflection of the original. 

Which algebraic representation ("rule") best represents the transformation in the picture?

Similar figures have the same ______ but different ______. 

• measure; shapes

• sizes; shapes

• value; measures

• shape; sizes

In a dilation what mathematical operation is used with the scale factor?

• addition 

• subtraction 

• multiplication 

• division 

 A dilation can produce a larger figure or a(n)______

• reduction

• enlargement

• scale factor

• center of dilation

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

• an enlargement

• a reduction

• a scale factor

• bigger