Dilations Transformations of Triangles

Triangle JKL will be dilated with a scale factor of 3/2. What will be the coordinates of J'?

• (3,9)

• (9,3)

• (1.5, 4.5)

• (4.5, 1.5)

Dilations of a triangle are similar to the original triangle.

• True

• False

Are the triangles similar?

• Yes

• No

Find the missing side. Triangle JKL is similar to triangle PQR.

• 24

• 54

• 18

• 72

Find the missing side. Triangle JKL is similar to triangle PQR.

• 6.5

• 26

• 8.7

• 19.5

Triangle CDE with side lengths 12, 16, 20 will be dilated by a scale factor of 1/4. What will be the side lengths of the dilated triangle?

• 8, 12, 16

• 48, 64, 80

• 3, 4, 5

• 6, 8, 10

What transformations were performed to get triangle L"M"N"?

• reflection over the x-axis and a dilation of 2

• reflection over the y-axis and a dilation of 2

• translation of 3 right and 1 up and a dilation of 2

• reflection over the y-axis and a dilation of 1/2

Dilations ALWAYS increase the length of line segments.

• True

• False

Figures ABC and DEF are similar.  Which series of transformations of figure ABC shows that ABC and DEF are Similar? 

• 90 degree clockwise rotation, then dilation by a scale factor of ¾
  

• 90 degree counterclockwise rotation, then dilation by a scale factor of ¾
  

• Reflection across a vertical line, then dilation by a scale factor of ¾

• Reflection across a horizontal line, then dilation by a scale factor of ¾
  

Figures A and B are similar.  Which transformation of figure A shows that A and B are similar?

• Translation 3 units up

• Translation 3 units down

• Dilation by a scale factor of 3

• Dilation by a scale factor of 1/3