IM Unit 2 - Async Mini Assessment

In a geometric DILATION, which of the following properties of the images can change?

• corresponding angles

• corresponding points

• the type of shape

• the side lengths (sizes)

Tags

CCSS.8.G.A.3

Even though the lengths of images can change in a dilation, the ratios of their lengths have to be...

• congruent

• proportional/equivalent

• less than 1

• greater than 1

Tags

CCSS.8.G.A.3

A SCALE FACTOR is...

• a number that when added, determines how much larger or smaller an image gets

• a number that when subtracted, determines how much larger or smaller an image gets

• a number that when multiplied, determines how much larger or smaller an image gets

• a number that when divided, determines how much larger or smaller an image gets

Tags

CCSS.8.G.A.3

Which type of scale factor for a dilation will result in an image decreasing in size? (shrink/reduction)

• scale factor that is negative

• scale factor that is exactly 1

• scale factor that is less than 1 (but not negative nor 0)

• scale factor that is greater than 1

Tags

CCSS.8.G.A.3

The images show a dilation of a cartoon image. What scale factor was used to create the dilation?

• 6

• 4

• 2

• $\frac{1}{2}$

Tags

CCSS.8.G.A.3

Which number could fill in both blank spaces to make the statement true?

Line segment CB was the original length. The dilated distance of C to H is about _____ times longer than the original. The scale factor is _____.

• 2

• 3

• 4

• 5

Tags

CCSS.8.G.A.3

Look at the two images shown. Which of the following statements are true? Select all that apply.

• the two images are not the same exact type of shape

• both images have corresponding angles that are congruent

• the images show the result of dilation

• the images are "not SIMILAR"

• the images are "CONGRUENT"

Tags

CCSS.HSG.SRT.A.2

CCSS.8.G.A.4

If rectangle ABCD was the original/pre image, which of the following statements are true? Select all that apply.

• the new image was a dilation by a scale factor of 2

• the new image was a dilation by a scale factor of

  $\frac{1}{2}$

• the two rectangles are SIMILAR

• the two rectangles are CONGRUENT

• all corresponding angles are congruent

Tags

CCSS.HSG.SRT.A.2

CCSS.8.G.A.4

A square is shown that includes the point (1, 2).

If a dilation is made with a scale factor of 5 that has a center of dilation at the origin, where will the new location of point (1, 2) be located after the dilation?

• (5, 10)

• (6, 7)

• (5, 5)

• (2, 4)

Tags

CCSS.8.G.A.3

Two triangles are shown (blue and yellow).  The ratio of vertical length to horizontal length in the largest triangle is  $\frac{6}{8}$  .  Which one of the following statements is true?

• The two triangles are NOT SIMILAR because they are not the same size.

• The two triangles are SIMILAR because when comparing the ratio of vertical length to horizontal length, they bot have equivalent ratios.  (both equal to   $\frac{3}{4}$  ) 

• The two triangles are CONGRUENT.

• It is impossible to determine if two images are similar or congruent from a grid.

Tags

CCSS.HSG.SRT.A.2