7.1 Dilations and Similar Figures Quiz

The triangle J'K'L' is a dilation of the triangle JKL. What is the scale factor of the dilation?

• 2

• 3

• 1/3

Answer explanation

To find the scale factor, first find the length of one side in the original triangle. For example, you can find the length of JK. Now, find the length of the corresponding side in the image, J'K'. Next, write the ratio of the length in the image to the length in the original triangle 16/8. Last, simplify the fraction.

Tags

CCSS.8.G.A.3

The trapezoid T'U'V'W' is a dilation of the trapezoid TUVW. What is the scale factor of the dilation?

(a)  

Tags

CCSS.8.G.A.3

The rectangle U'V'W'X' is a dilation of the rectangle UVWX. What is the scale factor of the dilation?

• 2

• 4

Tags

CCSS.8.G.A.3

Write the coordinates of G after a dilation with a scale factor of 1/3, centered at the origin.

• G'=(-2,3)

• G'=(2,3)

• G'=(3,-2)

• G'=(3,2)

Tags

CCSS.8.G.A.3

Write the coordinates of point W after a dilation with a scale factor of 5, centered at the origin.

• W'=(1,-2)

• W'=(-2,1)

• W'=(-10,5)

• W'=(5,-10)

Tags

CCSS.8.G.A.3

Graph the image of rectangle KLMN after a dilation with a scale factor of 4, centered at the origin.

Tags

CCSS.8.G.A.3

Two objects that are the same shape but not the same size are _______.

• Congruent
• Vertical
• Similar
• Complementary 

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

The point (8, 12) was dilated to become point (2, 3). What was the scale factor?

• ½
• ¼
• 4
• 2

Tags

CCSS.8.G.A.3

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 3.
• It's a reduction; the scale factor is 1/3.
• It's a reduction; the scale factor is 1/2.
• It's an enlargement; the scale factor is 2. 

Tags

CCSS.HSG.CO.A.2

Graph the image of square CDEF after a dilation with a scale factor of 1/2, centered at the origin.

Tags

CCSS.8.G.A.3