Dilation and Scale Factor

Jashon performed a transformation on a triangle with pre-image coordinates D(-6,0) E(-6,3) and F(-9,9). The coordinates of the image are D'(-2,0) E'(-2,1) and F' (-3,3). He challenges his friend Steve to describe the transformation. What response is correct?

• The pre-image was translated 3 units to the left

• The pre-image was translated 3 units to the right

• The pre-image was dilated by a scale factor of 1/3.

• The pre-image was dilated by a scale factor of 3.

A rectangle graphed on a coordinate plane is transformed to form another rectangle which is similar but not congruent to the first. Which sequence of transformations could the rectangle have undergone?

• A translation down 3 units and a rotation of 90 degrees.

• A translation down and a dilation of a scale factor of 3.

• A rotation of 90 degrees and translation of 3 units to the right.

• A reflection over the x axis and rotation of 180 degrees

Which is a TRUE statement about dilations?

• A dilation will ALWAYS reduce a figure.

• A dilation will ALWAYS enlarge a figure.

• A dilation will ALWAYS change the orientation of a figure.

• A dilation will ALWAYS produce a similar figure.

What effect will a scale factor of 3/4 have on a figure?

• Enlarge

• Turn

• Shrink

• Flip

Ms. Behie takes a poster to Copier Plus and tells them to use a scale factor 3.5 on her poster. What effect will a scale factor of 3.5 have on her original poster?

• Shrink

• Flip

• Turn

• Enlarge

Which side corresponds with side CB?

• Side AB

• Side DE

• Side DF

• Side FE

Two objects that are the same shape, but not the same size are _______________________.

• Complementary

• Similar

• Congruent

• Vertical

Which of the following is a scaled copy of figure A?

• B

• C

• D

If the scale factor is 4, what is the measurement of slide length x?

• 9

• 1.25

• 20

• 4

What is the scale factor from ΔABC to ΔDEF?

• 1/2

• 7/3

• 2

• 10/3