ISEE Word Problems Question 200: Answer and Explanation

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Question: 200

5. Triangle HJK is similar to triangle LMN.

What is the length of side LM?

  • A. 9
  • B. 12
  • C. 9a
  • D. 12a

Correct Answer: A

Explanation:

The answer is A

Set up a proportion: . Cross multiply: a? = 12 × a = 9a. Divide both sides by a: ? = 9.

Plug in a value for a, such as 4. Now set up the proportion: . Cross multiply and divide both sides by 4: ? = 9.

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