Dilation Geometry

Which of the following transformations is a dilation?

• Rotating a figure 90 degrees.

• Translating a figure 5 units to the right.

• Enlarging a figure by a scale factor of 1.5.

• Reflecting a figure over the x-axis.

If a dilation has a scale factor of 1, what can be said about the original and dilated figures?

• The dilated figure is smaller than the original.

• The dilated figure is larger than the original.

• The dilated figure is congruent to the original.

• The dilated figure is a reflection of the original.

If a dilation has a scale factor greater than 1, what can be said about the dilated figure?

• The dilated figure is smaller than the original.

• The dilated figure is larger than the original.

• The dilated figure is the same size as the original.

• The dilated figure is a reflection of the original.

If a dilation has a scale factor less than 1, what can be said about the dilated figure?

• The dilated figure is smaller than the original.

• The dilated figure is larger than the original.

• The dilated figure is the same size as the original.

• The dilated figure is a reflection of the original.

A balloon is initially 10 cm in diameter. After dilation, its diameter becomes 25 cm. What is the scale factor of the dilation?

Correct Answer: B) 2.5

• • A)1.5

• 2.5

• 3

• 2

What is the scale factor shown in the dilation shown?

• 5

• 1/5

• 10

What happens to the angles of a figure when it is dilated?

• The angles become larger.

• The angles become smaller.

• The angles remain the same.

• The angles are doubled.