Dilation from a Point Other Than the Origin

Choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

Tags

CCSS.HSG.CO.A.2

If point A (2, 1) is dilated by a scale factor of 2 with a center of dilation at (0, 2), what are the coordinates of A' ?

hint: you will need to use your graph paper!

• (4, 2)

• (4, 0)

• (-2, 3)

• (-4, 4)

Tags

CCSS.8.G.A.3

If point A (-3, 2) is dilated by a scale factor of ⅔ with a center of dilation at (3, -1), what are the coordinates of A' ?

hint: you will need to use your graph paper

• (1, 1)

• (1, -1)

• (0, 0)

• (-1, 1)

Tags

CCSS.8.G.A.3

Which of the following statements are true? Select all that apply.

• If the center of dilation is the origin, the scale factor is multiplied to the coordinates of the pre-image to determine the image coordinates.

• If the center of dilation is a point other than the origin, the scale factor is multiplied to the slope between the center and the coordinates of each pre-image point to determine the slope between the center and each image point.

• The center of dilation will always be stated in a dilation problem.

• When the center of dilation is the origin, you compare ordered pairs to find the scale factor.

• When the center of dilation is NOT the origin, you compare ordered pairs to find the scale factor.

Tags

CCSS.8.G.A.3

The scale factor for this dilation is:

Mathematical Equivalence

ON

Tags

CCSS.8.G.A.3

Dilations are ________ but not congruent.

• Similar

• Flipped

• Rotated

• Congruent

Tags

CCSS.8.G.A.3

How do you calculate the scale factor when given the original and dilated figures' measurements?

• Add the corresponding measurements of the dilated figure to the original figure.

• Subtract the corresponding measurements of the dilated figure from the original figure.

• Divide the corresponding measurements of the dilated figure by the original figure.

• Multiply the corresponding measurements of the dilated figure by the original figure.

Tags

CCSS.8.G.A.3

Point A (-10, 4) is dilated by a scale factor of 5 What are the coordinates for A

• (-5, 2)

• (5, -2)

• (-20, 8)

• (20, -8)

Tags

CCSS.8.G.A.3

Mathematical Equivalence

ON

Tags

CCSS.8.G.A.3

Enlargement or reduction?

• Enlargement

• Reduction

Tags

CCSS.8.G.A.3