Two triangles are similar. Sides of 6 and 9 in the first correspond to sides of 8 and x in the second. What is x?
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Correct!
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Correct answer to question 37 (Mathematics Knowledge): 12
Method
Similar triangles have proportional sides, so 6 is to 9 as 8 is to x. Cross-multiplying gives 6x = 72, so x = 12. Adding 2 to keep the difference the same gives 11, which is the trap.
Updated: November 2026
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