STAAR Review - Similarity

Figure ABCD is similar to figure WXYZ. Which proportion must be true for these figures?

• 
• 
• 
• 

Micah made a scale model of the Empire State Building. The building has an actual height of 381 meters. Micah’s model used a scale in which 1 cm represents 50 meters. What is the height in centimeters of Micah’s model? (a)  

• A. 3.2 cm
• B. 19.05 cm
• C. 36.83 cm
• D. 7.62 cm

Triangle JKL is similar to triangle MNO. What is the perimeter of triangle MNO? ______

(Type number only)

The triangles shown below are similar. Which line segment corresponds to RS? (a)  

• TS
• RT
• QS
• UT

Trapezoid FGHI is similar to trapezoid KLMN. What is the length of GH?
(a)  

• 5.5 in
• 8.5 in
• 7 in
• 6.75 in

The rectangle below is dilated by a scale factor of 3.6 to create a new rectangle. Which of the following could be the dimensions of the new rectangle?

• A. 14.4 cm x 5.4 cm
• B. 5.4 cm x 7.2 cm
• C. 7.2 cm x 1.8 cm
• D. 14.4 cm x 7.2 cm

Two boxes of tissues are similar in shape and size. The larger tissue box is dilated by a scale factor of 0.5 to create the smaller tissue box. What are the measurements of the smaller tissue box?

• F. y = 6 in, z = 3.5 in
• G. x = 3.25 in, y = 6 in
• H. x = 3.5 in, y = 6 in
• J. y = 6 in, z = 2.75 in

A map uses the scale of 3/4 of an inch to represent 3 miles. If the actual distance between two cities is 25 miles, then what is the length on the map? Report your answer to the hundredths place.