Dilations and Similarity Transformations

Quad OBCD is similar to Quad OHTE because:

• Quad OBCD can be reflected over the x axis and then rotated 90 degrees

• Quad OBCD can be reflected over the x-axis and then dilated about point O by a scale factor of 2.

• Quad OBCD can be reflected over the y-axis and then dilated about point O by a scale factor of 2.

• Quad OBCD can be reflected over the y-axis and then dilated about point O by a scale factor of 1/2.

Two objects that are the same shape but not the same size are _______.

• Congruent

• Vertical

• Similar

• Complementary 

Similar figures must have

• Proportional sides and equal angles

• Equal sides and equal angles

• Proportional sides and the same number of angles

• Similar looking shapes

True or false, when a figure is dilated, the corresponding angles are congruent?

• True

• False

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

• reduction

• enlargement

• scale factor

• center of dilation

Which of the following is NOT a property of Dilations?

• Dilations preserve angle measure.

• Dilations preserve betweenness.

• Dilations preserve orientation.

• Dilations preserve size.

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

• reduction

• enlargement

• scale factor

• center of dilation

True or false, when a figure is dilated, the new perimeter is always greater?

• True

• False

True or false, when a figure is dilated, the corresponding sides are proportional?

• True

• False

Does the image show a Dilation?

• Yes

• No