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Dilations & Similarity

Authored by Elizabeth Harwell

Mathematics

7th - 8th Grade

CCSS covered

Used 55+ times

Dilations & Similarity
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23 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Let  ΔXYZ\Delta XYZ be the dilated image of  ΔABC\Delta ABC with a scale factor of k = 3. Which of the following is the correct center of dilation?

(0, 0)

(4, 1)

(-5, 5)

(1, 4)

Tags

CCSS.8.G.A.3

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Let  ΔXYZ\Delta XYZ be the dilated image of  ΔABC\Delta ABC with a scale factor of k = 3. Which of the following is the correct center of dilation?

(0, 0)

(4, 1)

(-5, 5)

(1, 4)

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which of the following must be true in order for  ΔBCDΔRST\Delta BCD\sim\Delta RST 

a = 12 b = 8

a = 24 b = 16

a = 6, b = 4

a = 11, b = 13

Tags

CCSS.HSG.SRT.A.2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Let triangle EFG be a mapped image, dilated about the origin, from triangle JKL with a scale factor k=4 with J(2,2), K(3,4), L(1,0). Which of the following are the coordinates for E?

(12, 16)

(8, 8)

(4, 4)

(4, 0)

Tags

CCSS.8.G.A.3

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Mr. Murphy designed a new logo for the NHS math team. Part of the logo includes a pair of similar triangles as shown in the figure below.

The center of dilation for these triangles must be one of the vertices of the outside triangle.

The center of dilation for these triangles must be one of the vertices of the inside triangle.

The center of dilation for these triangles must be in the interior of the two triangles.

The center of dilation for these triangles must be exterior to the two triangles.

Tags

CCSS.HSG.SRT.A.2

CCSS.8.G.A.4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Let ΔDEF\Delta DEF be dilated by a scale factor of ½ to form the image  ΔRST\Delta RST . Let RS be 12 inches long. How long is DE? 

12 inches

24 inches  

6 inches

The length of DE cannot be determined.

Tags

CCSS.8.G.A.3

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is Dilation?

Dilation means to enlarge or reduce
Dilation means to reflect on something
Dilation means to like something
Dilation means to make something different by making it smaller

Tags

CCSS.8.G.A.3

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