ISEE Word Problems Question 272: Answer and Explanation
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Question: 272
6. Triangle ABC is similar to triangle PQR. The length of 
is 7 cm, and the length of 
is 4 cm. If the length of 
is 16 cm, what is the length of 
?
- A. 28
- B. 21
- C. 14
- D. 4
Correct Answer: A
Explanation:
A
Draw the triangles to make sure the corresponding vertices of the two triangles are aligned. Set up a proportion: 
. Cross multiply and divide both sides by 4.