Dilations Supporting TEKS

Which proportion must be true?

• F

• G

• H

• J

Tags

CCSS.8.G.A.4

Solve for X

• X = 5
• X = 2
• X = 3
• X = 4

Tags

CCSS.8.G.A.4

CCSS.8.EE.C.7

What is the formula for scale factor?

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

If a shape is dilated, how do you find the new area?

• You multiply the old area by the scale factor used in the dilation.
• You square the scale factor used in the dilation. Then multiply the old area by the squared scale factor.

Tags

CCSS.8.G.A.3

If a shape is dilated, how do you find the new perimeter?

• You multiply the old perimeter by the scale factor used in the dilation.
• You square the scale factor used in the dilation. Then multiply the old perimeter by the squared scale factor.

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

If a shape is dilated, how do you find the new perimeter?

• You multiply the old perimeter by the scale factor used in the dilation.
• You square the scale factor used in the dilation. Then multiply the old perimeter by the squared scale factor.

Tags

CCSS.8.G.A.3

If a shape is dilated, how do you find the new area?

• You multiply the old area by the scale factor used in the dilation.
• You square the scale factor used in the dilation. Then multiply the old area by the squared scale factor.

Tags

CCSS.8.G.A.3

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

CCSS.8.G.A.1

CCSS.8.G.A.5

Which of the following statements is NOT true for figures and their dilation when the origin is the center of dilation?

• F Corresponding sides of the dilated figure and the original figure are proportional.

• G Corresponding angles of the dilated figures and the original figures are congruent.

• H The corresponding coordinates of the vertices of the image are the coordinates of the preimage multiplied by a scale factor.

• J If the scale factor for the dilation of the figure is 0.9, then the dilation is an enlargement.

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Polygon ABCDE will be dilated by a scale factor of 2.  Which statement is NOT true of the dilation?

• The corresponding angles of the two polygons will be equal.
• The dilation will be an enlargement.
• The original and the image will be congruent.
• Polygon A'B'C'D'E' will be proportional to polygon ABCDE. 

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4