G2.3 Similarity Practice (Pd 3/6/7)

Fill in the blank: Two figures that are the same shape but not the same size are called _______.

• congruent

• vertical

• similar

• complementary

Which pair of images are similar?

• 
• 
• 

Complete the similarity statement:
 $\Delta JKL\ \sim\ \Delta$  ______

• PRQ

• PQR

• QPR

• QRP

Color code the side lengths to identify the matching pairs (like we did last Friday in class!).

What is the formula for scale factor?

In this dilation, CDEF is the pre-image and UVWX is the image. What scale factor did was used?

Hint: Count the boxes!

• 2

• 3

Match each picture with the correct scale factor. (Assume the left picture is the original and the right is the new!)

• 
• 1.5

• 
• 2

• 

The numbers below are scale factors for different dilations. Drag and drop to show which scale factors will create enlargements and which will create reductions.

Groups:

(a) Enlargement

,

(b) Reduction

Solve the proportion.

• k = 5

• k = 3.33

• k = 60

• k = 90

The rectangles are similar. Which proportion could you use to solve for x?

•  $\frac{4}{15}=\frac{22.5}{x}$  

•  $\frac{x}{15}=\frac{4}{22.5}$  

•  $\frac{x}{4}=\frac{22.5}{15}$